[cw abo, bkdk, omega baku, alpha deku, intersex omega]

Bakugou was so fucking sure he'd be an alpha. He had the attitude, the personality, and the powerful quirk. It was hard to tell by scent, but that was only because the scent of nitroglycerin covered up any musk he had.
Everyone more or less agreed with him, with the exception of his old man. Masaru suspected he might actually be a beta with a neutral scent that hid behind the smell of nitroglycerin.

Only his grandmother had guessed correctly, and that was when he was a baby. She died when he
was a toddler.

He didn't present properly, either. Most of his classmates had a change in scent, something that made it really obvious what their second sex was. Katsuki didn't know until he had his first heat.

That first heat was miserable. He stayed home from school
for a few days, and in the beginning, he was so sure it was rut. What else could explain the way he wanted to fuck everything soft and warm? But then, while masturbating, he felt something... not right. He hadn't ever gotten very exploratory while masturbating for fear of
blowing his junk off from his quirk, so he'd never noticed before, but just under his balls... was a tiny slit of a cunt. He could tell it was puffy and swollen, slick with heat, but it was still so small, perhaps underdeveloped from the amount of testosterone in his body.
Turns out, he was right to be afraid of blowing off his junk. He damn near blew up his whole room the first time he touched his cunt.

The rest of his heat dragged on. He refused to touch his omegan parts, no matter how badly his instincts wanted him to. The urge to sit on
his bedpost was strong, but his stubborn nature was stronger.

His parents took him to the doctor as soon as they could, who confirmed that Katsuki was, indeed, an omega. He was simply a late bloomer and hadn't developed other omegan characteristics yet. In time, his scent would
turn even sweeter and smell less like gunpowder, the doctor assured.

He never told anyone, but as a teenager, Katsuki thought his life was over.

The government wouldn't allow omegas to become heroes unless they were mated. Katsuki wasn't interested in mating, and even if he
was, what kind of insane alpha would want to mate him?

He didn't talk to his friends about how his first "rut" went. He'd snarl that of course he was a damn alpha, but he wouldn't talk about it. He withdrew, didn't even want to be around those guys anymore. All they talked about
was how big their knots were.

(Katsuki had seen most of their dicks. They were tiny.)

The last year of middle school came and went. It was all a haze to Katsuki. Nothing mattered anymore. He was a useless omega who'd probably end up whoring himself out for money.
On one of the last days of the school year, Deku asked to talk to Katsuki. Initially, the blond said no, but Deku was adamant, insisting it was important that they talk alone.

"The fuck do you want, nerd?" Bakugou asked once they had privacy. "Come to rub it in my face that you
get to apply to UA and I don't?"

"N-no, nothing like that!" Midoriya waved his hands and shook his head quickly. "Just... hear me out, okay? I have a proposition for you."

"... alright. Fucking spit it out."

Deku sighed, like he was trying to compose himself.
"Kacchan, I'm an alpha."

"You're a what now?!"

"I'm an alpha! Just saw the doctor to make sure." He blushed then, like he had admitted to something naughty. "I haven't told anyone because I didn't really think it mattered. Everyone thinks I'm an omega."

"Okay... so what?"
"Well... I know the law says you can't be a hero if you're an omega unless you're mated."

"Thanks for fucking reminding me."

"No, Kacchan, listen! I thought... well, I wanted to offer. I could... give you a mating mark. That way, you could be a hero."
Katsuki fell silent, but the look on his face said volumes.

"No one has to know. Like I said, everyone thinks I'm an omega. We can pretend things are the other way around, and only the hero board has to know."

"... no."

"... but Kaccha--"

"I SAID no."
The blond snarled, chest puffed up in a vague attempt at intimidation. Despite the exhausted, heartbroken look in Katsuki's eyes, Deku backed off some.

"Okay, okay... I just thought--"

"You thought what? I'm a helpless omega, right? Need a fucking alpha to come and save me?"
"No, Kacchan, that's not it at all!"

"Bullshit!"

"Kacchan, wait!"

He didn't wait.
Katsuki stormed out of the empty classroom before Deku had a chance to say more. No fucking way was he going to let that nerd do something like that to him.

The summer weeks passed. The incident with the damn sludge monster didn't help Katsuki's self confidence at all.
He felt even more useless; sure, his quirk was still powerful, but what the hell use was it if he couldn't use it in public?

Summer passed even more quickly after that. The deadline to apply to a high school was approaching, and frankly, Katsuki had been too depressed to apply.
It was about two weeks before the deadline when Deku showed up at Katsuki's doorstep.

He was the only one home at the time, so he answered, but he looked immediately pissed off about it.

"What."

Deku flinched slightly, but he didn't step back. He was growing bolder.
"Kacchan. I need to talk to you."

"Why?"

"Just... let me in, okay?"

"Fucking fine."

Begrudgingly, Katsuki cracked the door open further and let Deku follow him inside.

"You've got five minutes," he growled, crossing his arms tightly across his chest.
"Kacchan... you, um, know I have a quirk now, right?"

"Yeah. Still fucking pissed that you hid it from me."

"I didn't hide it! I'm a late bloomer, I swear!"

"Yeah, what the fuck ever. What of it?"

"Well... I'm applying to UA to be a hero."
Katsuki's nostrils flared as he inhaled, fire in his eyes.

"I had to state that I was an alpha in the application. If I get accepted... everyone will know that I'm either an alpha or a beta. I still haven't really told anyone."

"Fucking christ, not with this shit again."
"Will you just let me talk?"

That was different. Katsuki was so startled, he actually shut up.

"What I'm saying is, if I get accepted into UA, or any hero program for that matter, my offer can't stand anymore."

"... yeah."

"I just... wanted to make sure you were sure."
There was a pause. He really didn't want this, but... as much as he fucking hated to admit it, Deku had a point.

"I don't know."

"We still have time. You can take some time to think about it."

"I don't fucking want to."

"I know."
The look in Deku's eyes was soft, but not in that pitying way that Katsuki hated. It was sympathetic without looking down on him. More like they were equals.

"Why... do you even want to do this for me?"

"Well, you're my friend, Kacchan. Plus, you're the strongest person I know.
You'd be an amazing hero."

The alpha smiled then, and it was so sweet, Katsuki had to look away. Deku... cared. Fucking why? He was an ass, pushed Deku's face in the dirt through middle school. Why did he still care?

How could he actually like a broken omega like him?
"I'll think about it."

"Okay. Can I, uh, give you my number? So you can text or call me if you change your mind."

Bakugou nodded numbly, letting Deku take his phone to put his number in it.

"Text me if you need anything, okay?"

"Yeah, yeah. Get out."
Being kicked out was better than being cursed out and kicked out. Deku saw it as a small victory. So, with a tiny little smile to himself, he left.
That night, Katsuki couldn't sleep at all. He couldn't stop thinking about Deku's proposition. Somewhere, deep down, he knew he should go with it. The idea of not being able to be a hero was devastating; even his parents had noticed how depressed he'd been. Besides, mating just
meant they needed to mark each other occasionally and swap scented clothing. They didn't need to make it permanent, so long as his second sex didn't interfere with hero work.

Still, Katsuki couldn't move past the idea of Deku's teeth on his throat.
The mere thought of it made him shudder, though he wasn't entirely sure why. Initially, he'd assumed that shiver in his spine was some sort of disgust, but the more he thought about it, the less it seemed gross. He found himself wondering, when he let his mind wander unchecked,
how the nerd's lips felt, especially on that spot on his neck. They looked soft, but he could tell when Deku was anxious about an upcoming exam in the way they got chapped and bitten.

Fuck. That wasn't disgust, that was admiration. When did that happen?
Deku had grown somewhat into his alpha hormones over the summer, he supposed. It was all about hormones.

Before he could give himself time to think, Katsuki found himself pulling out his phone.

[Katsuki] I bite you first. And we're not scenting. We'll swap hoodies or whatever.
He sent the text without hesitation. Less than a minute later, he got a response.

[Deku] You changed your mind?

[Katsuki] I'm going to UA. No one's gonna fucking stop me.

[Deku] I know. So... do you want to come over tomorrow, or should I come over?
[Katsuki] tomorrow after 2, here.

[Deku] Okay, I'll be there.

Despite having a plan, sleep didn't come any easier to Bakugou.
The next day, Deku arrived at the Bakugou residence promptly at 2. Luckily, both of Katsuki's parents were away at work by the time he got there. There was a nervous energy in his step, and they exchanged few words as Katsuki let him into the house and up to his room.
"So... you're sure about this?" Deku murmured, finally breaking the silence when they were alone in Katsuki's bedroom.

"Quit asking me that," Bakugou growled, sitting at the edge of his bed and leaving space for Deku.

"I just wanted to make sure! It's a big thing, you know?"
"Not really."

"Well, it is to me."

"Will you shut up and sit down so I can bite you?"

Deku flushed a bright red and sat with his back against the wall. "Sorry."

Katsuki, at this point, was used to Deku having too much to say. He wasn't interested in chatting.
He brought a hand to the nerd's neck, tilted his head to the side. Deku smelled like pine and something clean; it was pleasant, as much as Katsuki hated admitting it to himself.

/Don't think about it, Katsuki. Just do it./

He sunk his teeth in quickly, earning a soft yelp
from Deku that morphed into an odd moan.

"The fuck was that?"

"S-sorry... it just felt really good."

"Fucking nerd. You would get turned on from something like that."

"Kacchan, stop... I did a lot of research, it's normal for that to feel good."

"Whatever. Just bite me
quick and get it over with."

Deku bit his lip slightly, hesitating for a moment. He brought one hand up to Kacchan's neck, brushing his hair away just a bit before biting down hard, doing his best to make it quick.

As soon as Deku broke skin, Katsuki understood why he
had moaned. It was hot and painful, but having someone so close, doing something so intimate... his body responded without his permission, gasping and forcing him to choke back a moan.

"Fuck..."

"See? I told you..."

Izuku's breath was warm on the wound, soft tongue lapping
the blood up before Bakugou could pull away.

"Oi..."

"Sorry."

There was an awkward silence that felt like it lasted far too long.

"We're not doing any of that shit. Just what the laws require for it to be a mating."

"Okay," Deku murmured, nodding softly. He looked...
Disappointed. Yet, he clearly understood.

"Give me your shirt."

"W-what?"

"For scenting, dumbass. I'll give you one of mine to wear home."

"Oh!"

Perhaps a little too excited. Deku stood and pulled his shirt off while Katsuki got him one of his dirty workout shirts.
"It's all sweaty..."

"The smell will last longer," Katsuki huffed with a roll of his eyes. "I'll let you know when I need a new one."

"Okay. Um... anything else?"

"Nope. Get the fuck out of my house."

"But... what about your heat?"

"The fuck do you mean, what about my heat?"
"Don't you need stuff for a nest?"

"My next heat isn't for another two months, dumbass. Plus, I've got my own shit."

"Okay, okay. Just thought I'd ask."

"Whatever. Get out of my house."

Deku left shortly after that, only stopping to clean the wound on his neck.
========
The Bakugou household erupted into chaos when Katsuki's parents got home.

"KATSUKI BAKUGOU WHAT THE HELL IS ON YOUR NECK?!"

Leave it to his mother to start screaming first and worry about his feelings later.

"Fucking calm down, hag!"

"Calm down?! You have a mating mark!"
"Deku bit me so I could apply to UA, alright?! Fuck!"

"Don't use that word with me!"

"Both of you, please..."

For the first time, both blondes looked to Masaru. He looked unusually calm, and just the scent of him was enough to bring Mitsuki down a notch.
"Katsuki," he started, "you should've told us you wanted to mate for such a reason."

"Like I was gonna talk to you guys about--"

"I know. I understand completely, but you still should've said something."

"... sorry."
Now both parents were stunned into silence. Had their son just... apologized? Sincerely?? What was happening?

"It's okay. Let's sit down and talk through it, okay?"

"Fine," Katsuki grumbled, back to his usual gruffness.
In the end, Mitsuki was still furious that her son had bitten Izuku without either her or Inko knowing about it. They were so young, far too young to be making those kinds of plans on their own. But, she did understand why he'd done it. Clearly being upset wouldn't reverse it,
so she let Masaru's cool, level-headedness ease her anger.

She did, however, have a long phone conversation with Inko, who was equally upset and without a mate to calm her.
Shortly after the whole debacle, Mitsuki insisted on having the Midoriyas over for dinner. Frankly, Izuku was the last person Katsuki wanted to see right then, but he supposed he needed to adjust to seeing him more often, especially if they were both going to UA.
Deku was a fumbling, blushing mess. Inko had been angry, sure, but most of her anger was over her son's lack of etiquette. She understood the need for it in the forced situation, but it didn't mean Izuku got a free pass. She had given him a stern lecture about courting rules
and how to behave around a potential mate, and it showed in the way he held himself.

Frankly, Katsuki thought the alpha seemed far more confident when it was just them, before his mother had stuck her big head into it.
Dinner went... well, messy. It seemed that as long as the boys kept quiet, though, they were more or less in the clear. It was when Katsuki opened his big mouth that they got scolded again for going behind their mothers' backs.
When the adults had turned their backs at the end of the meal, Katsuki grabbed Deku by the wrist and tugged him away, off to his room.

"The hell is wrong with you, nerd?"

"Wh-what do you mean, Kacchan?"

"You're a nervous wreck again. Was aunty really that mad?"
"Not really, actually... well, she's mad at me. She said I should be more proper..."

"What the hell do you mean, proper? What about any of this is fucking proper?"

"I-I... that's just what she said--"

"Well, quit it. It doesn't look good on you."

Deku blushed, eyes
steadfastly on the ground.

"Okay. Um... can I ask you something?"

"What."

"Could I... maybe have another shirt or a hoodie?"

"Already? The fuck are you doing with it?"

"Nothing weird! It's just... I can't sleep without it anymore. I tried the first few nights."
"Tch."

Deku bonded quick.

In a weird way, it was endearing. Before, having Deku latch onto him the way he had was annoying, but there was something about this that was different. He was trying his best to go at a slow pace, Katsuki could tell.
The blond moved to his laundry hamper and pulled out a few old pieces of clothing he'd worked out in, then rubbed them against his neck for good measure.

"Here. Wash 'em before you give them back."

"Thank you, Kacchan!"
The look in Deku's eyes... it was like before, when he'd said he liked Kacchan. There was a light there, and Katsuki couldn't say why, but he wanted to protect that light.

Fuck, that was new, too.

"Don't mention it, alright? Fuck."

"Sorry, Kacchan. Oh! Did you apply yet?"
"Just finished yesterday. Took a while because I needed the hag's signature and she's pissed off at me."

"What did you need that for?"

"Mated omegas need both parents to sign off stating that they're mated."

"Oh... I didn't even think about that."
"Tch. You wouldn't."

"Um... do you need any verification from me?"

"Someone'll probably call you and ask to verify or whatever. I just put down your number. Not like you aren't in their system."

"Yeah, haha... I've had my application done for a while. Just had to tell them
to keep my status quiet because of... this."

Once again, Katsuki found himself eyeing the wall and not Deku. A blush threatened to creep up his neck.

"... you didn't have to do that."

"I know. I wanted to."

"... thanks."

"Of course, Kacchan."
Katsuki didn't need to look up to hear the smile in Deku's voice. Fuck if that didn't do something funny to his chest.

"You should get going. Your mom is probably wondering where you went."

"Oh, right! Um, do you want me to rescent your shirt before I go?"

"Sure, whatever."
As much as Katsuki had given Deku shit for sleeping with his shirt... Deku's shirt was right there, at the head of Katsuki's bed. The alpha didn't say anything about it, though, just rubbed the fabric over his scent glands as thoroughly as he could.
"That should last a while. Thanks again for these, Kacchan!"

"Yeah, yeah. See you later."

Once again, Deku left, but the room felt far more empty this time than it had before.
===========
It came as no surprise to anyone when Katsuki got his acceptance message from UA. He couldn't help the excitement that bubbled in his chest at seeing All Might welcome him to the school. After months of thinking he'd never be a hero, let alone get into the top hero school, this
was just what he needed to lift his spirits.

Shortly after he received the message, his phone pinged. A text from Deku.

[Nerd] I GOT IN!!

"Tch. Good."

Why was he smiling?
[Kacchan] good. So did I.

[Nerd] CONGRATS! I knew you'd get in, Kacchan is amazing!

More excited bubbles in his chest. Definitely not from Deku.
Time sort of flew by after that. The routine of swapping clothes became easier once classes started, since they could simply swap after training at the gym. The facade was easy to keep up; Katsuki fit in snugly with the other alphas, while Deku managed to make friends with
one of the only omegas (Uraraka) on the first day. Kirishima pack bonded with the blond quickly, and Katsuki saw no reason to tell him of his secret status.

Perhaps he was a little jealous of Ochako. She so obviously liked Deku. A small part of him wished he could be so obvious.
But then, he was still sort of in denial about his feelings. Deku was, when he pushed aside his anxiety, a charismatic alpha who was quickly growing into his body. It was natural for Katsuki to be physically attracted to him. It was just hard to accept that after everything.
Things became more complicated when Katsuki's second heat approached.

His doctor refused to give him any suppressants for the first few years. Even when Katsuki told him he'd be attending UA with a lot of alphas, he insisted the omega wait a year to start regular suppressants.
For the time being, he had birth control and scent blockers, but nothing to suppress his heat.

He didn't notice the signs of pre-heat initially, but Deku did. He became more grabby with clothes, would steal Deku's gym clothes when he thought the alpha wasn't looking. The scent
that clung to them didn't seem to be enough some days. He found himself daydreaming about the nerd, about burying his face in Deku's neck.

It was only when he started daydreaming about Izuku's knot that he realized he must be close to his heat.
Later the same day, during a practice sparring session, things got worse. Aizawa had paired Katsuki with his alpha, and neither of them had any room for holding back. A particularly rough landing left the blond with a bloody nose and Deku with gashes in his knees.
He hissed and groaned, rolling a few feet away from Katsuki. The distance lit some agitated fire in his belly, but he didn't have words for it.

"Deku!" Uraraka called, jogging over from the sidelines. "Are you okay?"

"Get back," Bakugou growled instinctively, eyes flashing
an angry red at the omega girl. "Stay the hell away from him."

"Kacchan, it's okay, she just wants to help," Deku soothed, giving him a confused look. Katsuki never got possessive like that; it may have been easy for their classmates to mistake it as anger, but Deku knew better.
Katsuki knew Deku would recognize the possessiveness, knew that was what the look was about, and it snapped him out of it somewhat. He felt feverish all of a sudden. Fuck. He should've stayed home sick today.

"I'm going to see Recovery Girl."

"Do you want me to--"
"No," he growled, shooting Deku a heavy glare. "I'm fine."

Their classmates hung back, mistaking Katsuki's rage for alpha commands. Nothing was really making them stay, but it sure felt that way.

Deku stayed back out of sheer hurt. It was hard knowing his mate didn't want him.
Katsuki never made it to Recovery Girl. He felt far too sick, and he knew if he didn't go home immediately, the consequences could be severe. Neither of his parents were home yet, but he let himself in, locked all the doors behind him, then stripped all his clothes and hastily
put together a makeshift nest. He had plenty of things that smelled of his mate, and despite how little he wanted help, the scent still calmed him. Some deep, instinctive part of him still needed his mate there in some way.

He wasn't very good at nest-making, and he nearly
blew up his bed in frustration more than once. It wasn't perfect, and the little details were far too aggravating to him.

It would have to do. Without a living, breathing mate with him, he felt his nest would never be right.
A ping from Katsuki's phone made him stop fussing over his nest.

[Deku] Let me know if you need anything.

Damnit. Just like the nerd to be so concerned. The thought of him alone had slick dripping down the omega's thigh. The nest would have to do.
==========
Katsuki's second heat was absolutely miserable.

He refused to contact his alpha for any reason. They had a bond for the sake of his career, and he would not become a needy omega who couldn't handle his bodily functions alone. He refused to be weak.
His room was ill prepared, and his mother ended up sneaking in when she was sure he'd passed out to provide him food and clean towels. She knew he likely wouldn't clean up properly until it was over, especially since this one seemed much worse than his first one, but at least
they were there if he needed to wipe himself clean.

Katsuki had one heat aid his parents had bought for him after he presented (rather, it appeared in his room). It was a fairly simple dildo with a knot on the end, just enough to get him through the worst of it. It helped,
but something about it wasn't right. It was better when he buried his face in a pair of Deku's old, sweaty gym shorts. Something about the smell of artificial silicone turned his omega off completely. He did his best but was thoroughly frustrated by the end of the week.
The first day Katsuki was back to work, his classmates did their best to not make it weird. Deku had assured them that he got really riled up during his rut and that it was normal. Uraraka worried, but Kirishima shrugged it off and instead helped his bro catch up on schoolwork.
To say the beginning of their first year at UA was normal was like saying any of the first years were normal. Between the attack on the USJ, the sports festival, and the rapid approach of final exams, there was little room for either of the boys to breathe, much less grow close.
Then there was the forest training camp and Bakugou's capture.
The training camp started about two weeks before Katsuki was expecting his heat. As it was, his omega wasn't terribly happy to be sleeping with so many of his classmates, but he did his best to shake it off. All he could really do was keep Deku close,
try to quell his angry omega with his alpha's scent.

On any other day, he would've been fine dealing with the League of Villains, really. Shigaraki was too fucking full of himself. The only reason they got the upper hand was that stupid Compress asshole's quirk.
Katsuki doubted scent would be a problem. The scent blockers he used were strong, and he knew there was no way UA would let this happen for more than a week. He could manage a week. One day at a time, he told himself. It was fun to spit in Shigaraki's general direction
and watch the fumes spew from his ears. More than once, he blew some eyebrows off.

Then a week passed, and he'd had no sign of heroes making progress with his rescue.
Keeping himself calm was easy. Keeping his heat pheromones at bay was the hard part.

As much as he hated to admit it, Katsuki knew the villains weren't stupid. The second they picked up on his scent, it would be over. As best he could tell, at least two or three of them were
alphas. He suspected the weird blood obsessed chick was an alpha, which would be a problem.

The only thing keeping him going was the knowledge that the villains were restless. The heroes must have some idea of where they were. Hand bastard wouldn't be so nervous otherwise.
The impending hell broke loose when a series of small annoyances threw Katsuki over a metaphorical cliff.
The League had been taunting him the whole time, and while there was no chance of Katsuki joining them, it was becoming more and more aggravating the closer he got to his heat. Yandere girl was getting a little too comfortable with him, kept begging hand bitch to let her cut him.
He snapped his jaws at her, tired of fending her off. His canines didn't usually grow during heat, but his body was becoming desperate, tiny teeth sharpening to defend himself. One of those teeth scraped his lip and sliced it open.
At the scent of blood, every set of eyes in the room was suddenly on Katsuki, pupils dilated. Shigaraki, for once, looked genuinely surprised.

Toga's lips, still far too close to his own, curled into a sinister grin.

"Oooh... you're in trou-ble~"
Her words lit a match, pulled everyone out of stunned silence. The room erupted into chaos, all a flurry of too many hands trying to pin Katsuki down all at once. He managed to free his hands, but it did him little good when the girl's teeth were suddenly tearing at his throat.
Bakugou had time to scream, the cry of a wounded animal, before he lost consciousness.
===========
Deku hadn't slept properly in a week.
He had always been in tune with Kacchan, and that sensitivity only grew stronger once they'd mated. Not being able to feel him, to sense where he was... was torture.
There were several sleepless nights. It seemed the only time he was able to sleep was when his friends surrounded him and were (finally) able to lull him to sleep with purrs and fingers through his hair.
When he couldn't sleep, he'd sneak out past curfew, tip-toeing past his mother's bedroom and out the front door. Preliminary reports suggested a general area for the League of Villains' hideout, but so far, no one had successfully pinned them down.
There was this faint hope, deep in Izuku's chest, that maybe he could find them just by walking the streets. Not many people were out late at night, even in the back alleys of the city, so he figured he could track down Kacchan if he could just catch a whiff of his scent.
After a week of wandering at night and finding nothing, that hope was beginning to turn into desperation.

As much as Kacchan tried to hide it, Izuku had gotten good at knowing when he was close to his heat. Admittedly, he kept track of the days, too, but it really wasn't that
hard to tell. He couldn't easily smell his omega in person, but the scent that clung to his clothes changed throughout his cycle. When the capture occurred, Bakugou had had about two weeks left before his heat started. That was a week ago.
If the villains realized they had captured a hero in training who was actually an omega on the brink of heat...

Izuku shook his head, unwilling to even complete his own thought.
The night was particularly quiet. If he remembered correctly, there was an American hero conference being aired on television tonight, so perhaps people were busy watching that. He should be, too. He shouldn't be out here... but here he was.
He was about to turn around and head back home for the night when he finally, /finally/ caught the scent. It was faint, far too faint, but it was there. Kacchan smelled distressed, but more importantly, his scent was turning sweet. He probably had another four days at best
before his heat sunk in.

Without his permission, Deku's legs were moving. His chin tilted up, nose in the air to catch more of that scent. It was several blocks away, but the trail eventually took him to an old, run down hotel. Kacchan must have managed to scent something
near the stairs that led up into the building.

Deku wasn't stupid enough to enter the building or even get too close to it, for fear of surveillance, but everything in him was screaming to storm the place. He wasn't strongly in touch with his alpha, but right now, he felt like
it was a beast inside him, thrashing against its cage and begging to be let out. His mind was racing, trying to rationalize a way to storm in and rescue his mate.

It took a long minute for Deku to really collect himself. Rationally, he knew he couldn't go in there right now.
He had no backup, no one knew where he was, and he had no plan. It wasn't smart, and there was a possibility he could get Kacchan killed. He couldn't risk that.

So, digging his nails into his palms to steel his nerves, Izuku turned back and went home.
=========
"Midoriya, are you sure this is it?"

The same night he found Kacchan, Deku was quick to text his friends, brain formulating a plan almost faster than his hands could type.

Kirishima was instrumental to the plan, so he was the first one Izuku texted.
After that, he added Yaoyorozu and Todoroki to the chat, letting Kirishima help catch them up on the situation.

He messaged Iida last, making sure he was okay with how out of line they were going to be before he added him to the group chat.
Knowing how little time they had, they made a plan to go two nights from then, giving themselves a day to prepare. If the villains had been alerted to Deku sneaking around their hideout, rushing in would make it much more difficult to save Kacchan.
The disguises they wore were Yaoyorozu's idea. It did much to make them look shady, less like aspiring heroes and more like street kids.

Iida was the least sure of their plan. As he asked Izuku the question, he shifted from foot to foot.
The omega raised his nose in the air again, checking for the tenth time. This was it, the building his nose had led him to two nights ago.

"Positive. I don't think we have much time left, though. He smells... anxious."

None of them knew of Katsuki's status. While explaining
the situation, Izuku was careful to leave that part out. If everything went the way he planned, none of them would have to know.

As he was about to speak again, they heard a scream from high in the building. Perhaps it wouldn't go perfectly according to his plan, after all.
"Let's go!" he shouted, kicking down the poorly locked front door and using his quirk to scale the stairs more quickly. Iida was hot on his tail, followed by Todoroki, Yaoyorozu and Kirishima. The thick scent of blood was making his anxiety spike. Something had gone wrong.
As soon as they reached the top floor, they were met with a gaggle of villain underlings, clearly distracted but still meant to block their path. The smell of distressed omega was fainter than Izuku would've liked, making his anxiety spike even further.
"Kirishima, on me!"

"Right!"

"We'll hold them back," Todoroki called, freezing one of the villain's hands to the floor.

That was all the signal Izuku needed. He hopped easily over the villains' heads, while Kirishima used hardened arms to push his way through them.
The sight they were met with when they entered the last room at the end of the hall was not one either of them were prepared for.
Katsuki had managed to free himself in desperation, but he was passed out, slumped over in the chair. Small, deep gashes littered his throat where the alphas in the room had all tried to leave their claiming marks. His shirt was in ripped tatters on the floor.
The roar that left Izuku's throat was inhuman, and it gave the villains pause. He was a snarling, hulking mass of angry alpha, and despite how little that bothered Shigaraki, the other villains were actually beginning to shrink away.
Luckily, Izuku's display stunned Kirishima much less than it stunned the villains. It gave him time to charge in, knocking Shigaraki away like a battering ram. He flashed angry teeth at the other alphas, who shrunk away further. Bakugou was Kirishima's pack mate, after all.
He may not be as enraged as Izuku was, but he was still /pissed/.

"Go, Deku!"

Deku was two steps ahead of him. He swooped in and snatched his mate up, cradling him as carefully as he could and charging toward the nearest window.
Kirishima seemed to catch on to his plan, and he charged at the window, too, punching the glass out quickly for Deku. Glass cuts were the last thing Bakugou needed right now. The redhead stayed behind when Deku fled out the window, doubling back to make sure their classmates
got out safely.

Deku didn't have time to look back. He was far too concerned with keeping his mate alive and getting him to the hospital.
==========
The rest of that night didn't go as smoothly as it did for the young heroes.

Finding the League's hideout triggered a series of other events. All For One was summoned to the scene when he heard from his prodigy of their failure, and as soon as he heard about the situation,
All Might was on the scene, doing what he could to bring All For One into custody. He succeeded, but it nearly cost his life.

Izuku didn't learn of any of that right away. When they got to the hospital, Katsuki was ushered into a surgery room, and due to sterile procedure,
he wasn't allowed in the room with his mate. They assured Izuku he'd be notified the second they were done with stitches and Katsuki was stabilized, but the hour felt like an eternity.

In that hour, he was able to get in touch with his classmates. They were all fine, albeit
Yaoyorozu suspected she may need stitches for a gash Toga had left on her. They arrived at the hospital before the doctors were done with Katsuki to find Izuku pacing the length of the waiting room, steeped in his anxiety.
"Kirishima," Todoroki murmured when they found Deku, "why don't you stay here with Midoriya? We'll take Yaoyorozu to get her arm looked at."

"Yeah. They might let me into the ICU since I'm Bakugou's pack mate." The redhead nodded and fell in step with Izuku, taking his elbow
to try and slow his steps.

At first, he growled. He'd been so up in his head that he hadn't noticed Kirishima, let alone their other classmates.

"Hey, hey, it's just me. Relax." Kirishima tried soothing his friend with calming alpha pheromones, but it did little to ease
Izuku's anxiety.

"Come on, Midoriya, he's gonna be okay."

"I know, I'm just, not okay. We haven't been apart this long since we mated."

"Hey... um, Midoriya, I'm sorry if this is too forward, but... you're his alpha, right?"
Deku's heart stopped, and it showed on his face. The sheer panic that overtook him was enough to confirm Kirishima's suspicion.

"It's okay, relax, dude, please! It's okay. I'm not gonna tell anyone. I know how he is. I just... wanted to know for sure."
The smaller alpha took a small breath, shoulders relaxing minimally.

"... yeah. We did it so he could get into UA."

"I figured. He sort of smelled like it when we found him, and that roar, dude... you sounded like the scariest alpha I've ever seen!"
"Shh, Kirishima! Don't say that so loud!"

"Sorry, but it was cool!"

Izuku blushed and smiled sheepishly. "I don't normally act like that..."

"I know. You did what you had to do. But, since I know now, I wanted to ask... you're cool with me and Bakugou being so close, right?"
"Well, yeah. Why wouldn't I be?"

"Well, it was different when I thought he was an alpha. Knowing... well, I don't want you to think I'm like, coming in on your territory."

Deku blushed even deeper then. "Oh my gosh, no, it's fine. We're not... like that."
"What do you mean?"

"Uh... when we mated, I only... bit him. We didn't..."

"Oh." Kirishima blinked in something of surprise. "So you guys aren't really intimate or anything?"

"No," he sighed, looking a little defeated. "I offered to bite him so he could be a hero. He told me
right away that he didn't want to be anything more than that."

Before Kirishima could respond, a nurse entered the waiting room and called, "Here for Bakugou Katsuki?"

Both alphas perked up and followed her quickly to the ICU as she briefed them on his condition.
"He's extremely dehydrated, and he has around 27 stitches in his neck. Which one of you is his mate?"

"Me, but keep that quiet," Izuku murmured, to which she nodded.

"You'll need to repeat the mating process with him when he's stable. As far as we can tell, his original
mating mark has faded significantly. He was probably due for another one soon. His heat was coming up, right?"

"Yeah, but... we haven't ever done anything. We only bit each other and used clothing for scenting."

The nurse sighed and shook her head a little. "That's
not good. It's possible the trauma he's suffered could've broken your bond. In the future, you need to be more careful and mate more thoroughly. At the very least, you'll have to mate properly before either of you can get your hero licenses."

"Wait... really?"
"Yes." She sighed again, though now she seemed annoyed that no one had told them. "It might not be in his best interest for you two to mate during the heat he's about to start, but you need to do it as soon as possible to ensure he isn't in any danger. Losing his bond right now
could kill him."

Both teens fell silent. The rise of anxiety in Deku's throat was nearly audible in the quiet hallway.

Would Kacchan... accept a proper mating? He supposed they didn't really have a choice. He couldn't bite him again, not anytime soon. Recovery Girl could
probably help his wounds heal more quickly, but the nurse was right. They needed a more solid bond to make sure Kacchan didn't suffer any more from this.

Deku didn't realize he'd been mumbling until Kirishima patted him reassuringly on the back as they headed inside the ICU.
The room Katsuki was being kept in only had a curtain as a door, in case a nurse needed to rush in if something happened. Blankets surrounded him to keep him warm and to act as a makeshift nest, so he didn't freak out when he woke up.
He was far too pale, and his neck was blooming in purple bruises. Despite how bad he looked, the heart rate monitor he was hooked up to proved his vitals were stable.

Izuku sank quickly into the seat beside him, scenting any open skin he could that wasn't bruised.
"Is there anything you need, Midoriya?"

"No, not... right this second. I'll call my mom when she's awake and talk to her about what happened. Go home and get some rest."

"Are you sure?"

"Yeah. I want some privacy with him."

Kirishima nodded, patting Izuku's shoulder.
"I'll come back in the morning. Text me if you need anything. Try to get some rest, okay?"

Deku gave a weak smile. He was just happy to have Kacchan back alive.

"I will. Thank you so much, Kirishima."
============
The first thing Bakugou was aware of when he woke was light. Even through his eyelids, it was far too bright.

The second was the throbbing pain travelling through his head and down his neck. It made him groan deeply and frown, reaching up to cover his eyes.
"Kacchan?"

Deku's voice was soft, but still far too harsh. It felt close, too, so either he was dreaming, perhaps a near death dream of his mate, or he'd gotten out alive.

One eye cracked open into the harsh light to see Deku's concerned expression, inches from his own.
"Blinds..." he croaked, throat dry with disuse. Deku nodded and moved quickly to close the blinds and dim the lights in the room.

"Is that better?" he asked softly, returning to his seat.

"Yeah." Katsuki let his arms drop, eyes slowly cracking open as they adjusted.
"Where am I?"

"The hospital. I was able to track you down and plan a rescue mission. You were in rough shape when we found you."

Right, his heat. All those damn alphas had gone for his throat. He couldn't feel the heat now, but he assumed they were giving him suppressants
until he recovered enough. A heat now would be hell.

"Guess I should thank you."

"Huh? No, you don't have to, really, Kacchan. Anyone would've done the same thing in my position."

"Really? Figured I was dragging you down. Not like we have any kind of good relationship."
Izuku actually looked hurt, then. "No... but I care about you. You don't drag me down. Even if we don't have a normal relationship, just being able to be as close to you as I am makes me happy. I've looked up to Kacchan since we were kids."
He really didn't want to, but Katsuki couldn't help but blush a little. Damnit. He turned and glared at the ceiling.

"Not like I'm any good for you. You'd be better off if you didn't care about me."

"Maybe I would be."
Crimson eyes shot back to Izuku, who was smiling sadly.

"I know you think you're not good for me. Everyone thinks you're not good for me, but... how I feel is how I feel, Kacchan. I tried to ignore it for a long time, and it didn't get me anywhere."
Deku leaned in close, far too close for what Katsuki's normal comfort zone would be, and left a tiny kiss on his forehead.

"I love you. For what it's worth, I'm here to stay, if you'll have me. I'm not saying we have to jump into anything, but... after all this, I thought
you should know how I feel."

For perhaps the first time, Katsuki didn't know what to say.

He didn't deserve this. He'd been awful to Deku for so long, pushed his face in the dirt and called him a useless omega... yet here he was, being a perfect alpha and showering him
with affection he didn't deserve.

The speechlessness apparently showed on his face. Deku shook his head slightly and smiled.

"You don't have to say anything right now. Just know I'm here, and I'm happy to be here in whatever capacity makes you comfortable."
"... I don't deserve it."

"Maybe you don't, but I'm here anyway."

Katsuki bit his lip. Fuck. He would not cry.

"Hey, he's awake!"
Kirishima burst into the room at just the right moment for Bakugou. His voice boomed in the quiet room, though, and the blond flinched and groaned.

"Head hurts..."

"Oh, shit, sorry, bro!"

His voice was much quieter this time, and he sat on the free side of the bed.
"Other than your head, how do you feel?"

"... weird."

"Yeah, the nurse mentioned they had you on suppressants, so you might feel a little weird."

Katsuki frowned deeply at the redhead. "What?"

"Like, for your heat."

/What?/
His eyes widened for a moment before he shot Deku a glare of "I'd kill you if I wasn't hospitalized".

"Ahh, sorry Kacchan! He figured it out on his own!"

"Don't worry, bro, I'm not gonna tell anyone. Your secret's safe with me!"

Katsuki turned slowly to glare at Kirishima,
gauging if he wanted to also murder the redhead when he got out of the hospital.

"It better fucking be."

"Hey, I've got no reason to tell anyone. You're still my bro. I just... know you a little better now, yeah?"

"Tch. Yeah."

Izuku sighed, knowing he'd just dodged a bullet.
"Hey, since you're awake, do you need anything? I can get the nurse to grab you some painkillers for your head."

"Yeah. Some water, too... and something to eat. M'fucking starving."

The alphas shared a relieved look. Appetite was a good sign, according to Bakugou's nurse.
"I'll be right back, then!" Kirishima grinned and hustled off to retrieve things for his bro.

"God, he's a fucking ball of sunshine," Katsuki groaned, and when Izuku giggled in response, the blond shot him a glare.

"Oi, quit that. I'm still mad at you."
"I'm sorry, Kacchan... he was in the hideout with me when we rescued you. It would've been almost impossible to cover it up. I sort of... went crazy when I saw all those alphas trying to bite you."

Fucking christ. Once again, Bakugou was blushing.
"Yeah, yeah... whatever. Guess I can't be that mad. You did save me."

"We did," he chuckled, hands resting on the bed.

There was a small, comfortable moment of silence in which Bakugou clearly had something on his mind. Tentatively, he reached out and laid one hand over Deku's.
"Thank you. For real."

Izuku was blushing then, like he couldn't believe Katsuki was making any kind of move at all. He smiled, though, tears welling in the corners of his eyes.

"Of course. I missed you, Kacchan."

"Oh, stop. You're such a crybaby."
"I know, I'm sorry! You know I can't help it."

Katsuki chuckled, just softly, and gave Deku the tiniest fond smile. Damn nerd. He was his nerd, though.

"Hey, how long have I been out for?"

"A few days. It took a bit for the suppressants to work, so your body was trying
to push further into heat. You had us worried."

"Tch. Did they get the villains?"

"I'm... actually not sure. I haven't watched the news."

"Really? YOU haven't watched the news?"

"I told you, I was worried. I barely ate or slept."

"Christ, nerd. You're eating with me
when shitty hair comes back."

"Can do," Izuku giggled. God, the nerd looked like a middle school girl talking to her crush.

"You should check the news for us, too."

"Oh! Yeah, here, the TV remote is around here somewhere..."
It took a few minutes for Izuku to figure out where the remote was, and in that time, a nurse came in to sit Katsuki up and give him painkillers. The pills were bitter in his dry throat, but the water was like heaven. He hadn't drank in days.
When Izuku did get the news on, All Might's withered face shocked both teens into silence.

"Now... it's your turn," he rasped, pointing at the camera.

"... Deku."

"Yeah?"

"What the FUCK happened?"

"I... I don't know--"

"Shut up, they're talking--"
They fell silent for the next five minutes, soaking in the reporter's words. It was only then that they learned of All Might's fate. The number one had used the rest of his power... to protect Katsuki's escape.

Katsuki had ended All Might's career.
How was he supposed to live, knowing that?

The silence that followed the report was heavy this time. Deku must have sensed what he was thinking, but he found no words for what felt like an eternity.

When Kirishima returned with two trays full of food, the room was still
heavy with silence.

"Woah... what happened?" he murmured, setting the trays aside.

"We watched the news..." Izuku murmured back, eyes full of tears.

"Oh... oh no. Guys, it's okay. He came and talked to the class. He's okay."

"But... he looked so bad."
"He's doing okay, really. Recovery Girl worked with him for a full day."

The three grew quiet, knowing how heavy the fall of the number one hero was, the implications that had on Japan.

"Well," Kirishima huffed, "I got enough food for all three of us. I don't know about you
guys, but I'm starving. Let's not think about that stuff right now, okay? Bakugou is still recovering. We can worry about it later."

Before either could protest, Kirishima had a spread laid out on the rolling hospital table in front of Katsuki, well within the reach of everyone.
"Fine," Katsuki eventually sighed. Truthfully, he really was starving, and even if it was shitty hospital food, he'd been drooling since the moment he first caught a whiff of it.

As they ate, Kirishima insisted they put on a comedy show, if only to distract them a little.
The redhead knew how depressing the news were right now, especially to Bakugou and Midoriya, so he did everything he could to keep their spirits up.

Through the rest of the day, some of their classmates came and went, visiting and checking in with both boys. That was how
Katsuki found out who'd been involved in his rescue. Despite himself, he ended up giving Todoroki a nod of respect and outright thanking the five of them for risking their lives. Frankly, it was one of his more humbling moments.
It wasn't until the following day that they met with Bakugou's doctor and had the discussion Izuku had been waiting for.
"Bakugou Katsuki?"

The doctor was an unusually large man for a beta, and his neutral scent immediately gave away his status. Katsuki looked up as he entered and narrowed his eyes.

"Yeah?"

"We need to have a little discussion. May I sit?"
His eyes narrowed further, but Deku waved him in.

"Just ignore him, he's grouchy today," the alpha chuckled, much to Katsuki's irritation.

"That's alright, I'm used to it." The doctor sat at a rolling chair and pulled up a computer with Katsuki's chart. "So, I've been told
about the situation here. I want to say right away, I'm not allowed to share your status with anyone who isn't working your chart. So, even if I wanted to, I can't by law. You can relax, I only want to talk about it for your health's sake."

That did relax Katsuki a bit.
"Okay. What's there to talk about?"

"Are you aware of the trauma you sustained to your neck?"

"Yeah. Looks nasty."

"It'll heal," the doctor assured with a calm smile. "However, those cuts mean your mating mark was also damaged. You may not feel it right now because
your mate hasn't left your side, but your bond has been weakened by the trauma you suffered."

"Okay... what does that mean?"

"Well, due to the stitches you have, Midoriya won't be able to bite you safely for some time. It isn't safe for you to remain with your bond weakened
this way, so you'll have to strengthen your bond another way."

Fuck.

Katsuki blushed down to his neck. God damnit. Of course that's what this was about.

"Since your heat was originally due nearly a week ago, we suggest you two spend the heat together. That's the easiest,
safest way to seal the bond without mating marks. We have heat rooms here in the hospital, and we can provide you with everything you need, from protection to meals."

"... and if I don't want to do that?"

He didn't have to look to know Deku was deflating in his chair.
"The only other way would be regular scenting, at least three times a day, until your wounds have healed enough to reinstate the mating mark. In your position, we can't recommend that, however. UA students are at an even higher risk than other hero course students.
We generally don't even recommend a simple mating mark and scenting to UA omegas, much less omega heroes. If you don't do it now, you'll have to do it in the near future."

Katsuki took a deep breath to steel his nerves, then chanced a look at Deku. The nerd's expression, for
once, was unreadable.

"It's up to you, Kacchan. I won't force you to do anything, but... we'd be safer using your heat."

Damnit. Of course the nerd wanted in his pants.

"I'll give you two some privacy so you can discuss--"

"No need," Bakugou huffed, narrowing his eyes
once more at the doctor.

"I'll do it."

"Kacchan, are you sure--"

"Yes. I'm not about to be a burden anymore."

"I told you, you're not a burden..."

"Yeah, well, I feel like one. I can't have you guys risking your lives to come rescue me again. I'll do it."
"In that case," the doctor started, "we'll ease off your suppressants over the next two days. Your heat should start promptly after that. I'd usually recommend going slower, but you're healing faster than we expected you to, so you should be fine. In that time, I suggest
you both have someone pack clothes from home, both for a nest and so you have clean clothes at the end of it. We provide blankets, but they're all sterilized. I'll go ahead and reserve a room for you, and when you're ready, a nurse can take you there."
Katsuki nodded; an odd sense of numb had taken over him. It felt like he had no choice in this. It wasn't like he hadn't wondered about Deku's knot before, but he'd always imagined their first time would be different.

"Hey," Deku murmured, laying one hand on Katsuki's arm
as the doctor left to give them privacy, "you're really sure about this?"

"Yeah. Doesn't seem like I have a choice."

"I mean, you do... we could keep a regular scenting schedule and do this when you're ready."

"Might as well just get it over with, though."
"No, Kacchan," he groaned, shaking his head. "I don't wanna do this if you aren't actually ready. I know we aren't there yet. We can wait until you're comfortable. Plus, then you could make a nest at home."

"... I'm not spending another heat alone," the blond muttered quietly.
"I don't want you to have to," Deku murmured, hand finding Katsuki's to squeeze it. "But I want you to be ready. It's not right for me to do that if you don't really want it."

Katsuki fell silent, fingers trembling just slightly in Izuku's. It didn't go unnoticed by the alpha.
"I can talk to the doctor and see if we can work out a different plan, if you want. We'd have to start scenting really regularly, though. No more using old clothes."

"I know."

"You're okay with that?"

"... yeah. I can deal with that."

"You can deal with that, or you want to?"
He bit his lip. Heat rose to his cheeks, and he internally cursed his body for betraying him.

"I'm okay with it."

That seemed to suit Deku. He nodded slightly, then pressed his lips in thought.

"What's that look for?"

"I... want to try something."
"Then just do it. You think too much."

Katsuki hadn't taken his hand back. He meant it as comfort to Deku, proof that he really was okay with all this. Deku obviously cared and was obviously becoming a strong alpha. He wasn't sure of his own feelings yet, but the physical
attraction was too strong to ignore now.

Deku studied his omega's face for a moment, looked over his neck, before he leaned in slow, giving Katsuki plenty of time to pull away. He carefully brushed their scent glands together, gentle but with meaning.
Katsuki, for his part, didn't move. If anything, he relaxed into the touch, and if he let out a tiny rumble of a purr, neither of them said anything about it. It was the first good scenting he'd had since before his capture, and it felt better than any dumb piece of cloth could.
It was a long moment before Deku pulled back to sit up. His eyes were hazy, like he could've laid down and taken a nap with his omega like that.

"Yeah, I'm okay with that," Katsuki rumbled after a moment. It snapped Deku out of his haze, made him giggle.
"Good. Me too."

Maybe it was sappy and gross, but Katsuki was becoming less and less able to push it down. Feeling this way was... nice. It was tough to make himself relax and remember that Deku really did care, but he could learn to deal with that.
===========
It took some convincing for Katsuki's doctor to go along with their plan. Deku was persistent, though, and it showed, so they reworked the omega's treatment plan. The boys would scent a minimum of three times a day, share a bed at night, and remain mindful of the healing wounds
on Katsuki's neck. They had two weeks to let Katsuki get comfortable, and by the end of the two weeks, he was to make a nest and prepare to share his heat with Izuku. Katsuki's parents planned to be away in that time, to give the boys privacy, but the school board insisted
on hiring security to stake out the residence, just in case something should go wrong. Aizawa wasn't a fan of letting this happen outside the hospital, but Mitsuki was dead set on letting her son be as comfortable as possible.

When the details were worked out and Katsuki's
doctor felt comfortable the omega would be safe, he signed off on his discharge. He sent Katsuki home with plenty of resources in case they should need something in the process of re-mating.
Inko insisted the boys stay with her for the first few days. She knew Mitsuki and Masaru were overwhelmed as it was, and being around his mom would probably stress Katsuki out more. Plus, she figured it was only fair that she host the boys for half the time. Izuku was her son,
after all.

At first, it was a big adjustment. Katsuki had to remember to put himself at Izuku's side all the time, though his anxious omega and his alpha's attentiveness meant that was fairly easy. They started a routine of scenting after their morning showers, then
once after lunch in the bathroom, and at least once before bed. Scenting at school was Katsuki's least favorite, but by lunch time, he was ready to tackle anyone who so much as glanced at Midoriya, so it was a necessity.

He wouldn't admit it so openly in the first few days, but
their nighttime routine of crawling into bed together, scenting, then spooning and drifting off was Katsuki's favorite. He'd never slept so soundly in his life as he did wrapped around his mate, sharing a bed that now thoroughly smelled like both of them.
The routine quickly became comfortable, but it was still a lot of changes that sometimes felt like a roller coaster, and by the end of the first week, Katsuki was, frankly, exhausted. Deku spent Saturday morning convincing him to relax the rest of the day, which ended up
being the best decision he could've made. Inko made their favorite foods for dinner, and being able to watch dumb All Might movies and cuddle all day had his omega more relaxed than it had been all week. Even with the roller coaster of emotion Katsuki was on, he was comfortable.
Of course, he was still grumpy and didn't like admitting how much he was enjoying this, but that was fine. Deku knew it would take some time. He wasn't asking for a declaration of love, or even a smile. The rare, genuine smile he did get made him feel like the luckiest man alive.
The lax, sleepy day they had on Saturday earned Deku an extra inch of trust.

That night, they went about their routine of scenting in bed, facing each other and making little contented noises at each other. Normally, when Deku was satisfied that Katsuki smelled like him, he'd
roll over and be the little spoon. Before he had a chance to, though, Katsuki made a little face at him and rolled over instead, pressing his back to his alpha.

"Kacchan..."

The sleepy omega only grunted back and reached for Deku's hand. It must have been enough reassurance,
though, because Deku quickly relaxed, curling himself around Katsuki.

It was a small gesture, but for Katsuki, it was a big sign of trust. It was like a cat showing his owner his belly. He trusted Deku.
[cw NSFW coming up... which is hilarious because I'm writing this at work]

Link to the beginning of the thread: https://twitter.com/qween_bee_/status/1181986317246357504?s=19
It was one thing for sleepy, relaxed Katsuki to let his alpha curl around him to rest.

It was another thing entirely to wake up with Deku's morning wood pressed firmly into his ass.
It was a bodily function Katsuki hadn't considered at all. He didn't really get morning wood often, and even when he did, Deku hadn't seemed to notice. His omega dick was a fair amount smaller than Izuku's, which felt like a damn monster trapped under fabric right now.
He wasn't prepared for the situation at all, and he felt frozen, unable to process or figure out what to do. His discomfort must have showed, though, because before long, Deku was letting out a little sigh behind him and burying his nose in Katsuki's neck.
"You okay, Kacchan?"

Damn nerd, didn't realize what his own dick was doing--

As if he'd spoken aloud, Deku froze as well and shifted his hips back.

"Oh my god, I'm sorry. I didn't..."

"Shut up," Katsuki huffed, relaxing a bit. "It's whatever. Gotta get used to it."
That seemed to relax Deku a bit, but it did nothing to quell his embarrassment. "Y-yeah... right."

The moment of awkward silence that followed felt tangible. Thankfully, it was only a moment before Inko called into the room to break it.

"Boys, are you awake?"
"Yeah, mom," Izuku called back, trying to mask the waver to his voice.

"I have to run some errands this morning, so I'll be back later. There's pancakes in the kitchen for you."

"Okay, thanks!"

Both boys fell silent again. Izuku still felt embarrassed, but Katsuki was waiting.
When he heard the slam of the front door as Inko left, he let out a small sigh and slowly shifted himself back, flush with Izuku again. The movement forced a small hiss out of the alpha; whether he meant to or not, Katsuki was pressing his ass right up against his erection.
"Kacchan--"

"Shut up, nerd." Just let it happen.

Deku couldn't relax like this, but he did tentatively lay his hand back on Katsuki's hip. The only relief he had was the sense that the omega wasn't really sure of himself, either. This was experimental, so it was okay to be
so unsure of what was happening.

Meanwhile, Katsuki's mind was racing. He felt sort of lame, being so unconfident in what he was doing, but the hand on his hip helped.

Slowly, he arched back, grinding and relishing the way Deku's breath hitched at such a simple motion.
The alpha's scent was picking up, growing heavy with arousal, and it pleased Katsuki to no end to know that he had this kind of power over his alpha.

"Listen, Deku. I'm in charge here. I'm not a shitty omega who can't function without my alpha."

"I know," Deku breathed back
before Katsuki could keep ranting. "S'why I haven't made any moves. Want you to be comfortable."

A small rumble rose in Katsuki's chest before he could stop it. Deku was being so good. He rolled his hips back again, to reward the alpha, only to blink in surprise.
"Deku..."

"Mm?"

"You're huge."

"Wh--! I'm not?! My doctor said I'm average for an alpha!"

"Must be a fucking grower, not a shower. Not like I haven't seen you soft. You're usually the same size as me."

Deku didn't have full words to respond with, only embarrassed sputtering
noises that weren't coherent.

"Relax, nerd, jesus. I'm not saying it's a bad thing. Just... never really seen an alpha hard."

There was a long, pregnant pause while Deku regained some composure.

"Do you, um... want to see it?"

Katsuki whipped his head around to look at
Deku, only to find patient, testing eyes watching him. He was still red as a tomato, but Katsuki was pretty sure their cheeks were matching at this point.

"Can't guarantee I'll do anything with it."

"You don't have to do anything you don't wanna. I'm just offering."
Fucking christ almighty Deku you can't just /offer/ to let someone see your dick--

Katsuki bit back the string of curses and rolled over, sitting upright in the transition. Pride be damned, he was curious. He himself never gained more than a few centimeters while hard.
Deku took the move as a green light, so he sat up himself, tossing the blanket aside. He'd started sleeping in his boxers, so his arousal was completely obvious. It strained tight against the fabric, leaving Katsuki to wonder how Deku saw his dick as anything but a monster.
"Seriously, how many centimeters?"

"I haven't, uh..."

"Bullshit, everyone measures. How many."

Deku went pink and muttered a number.

"Eh? Come on, I need to know."

"What do you mean, you need to know?"

"The damn thing's going inside me, right? I need to know!"
Both boys went pink then. Katsuki had a point, though.

"... almost 20," he muttered again, slightly more audible.

"Jesus christ. What the fuck does she feed you?"

"Kacchan, stop," Deku whined, curling shyly away from his omega. "It's weird."
"Not like anyone but me will ever know you're packing a monster. Lemme see."

He seemed a little reluctant, knowing Kacchan thought he was huge, but Deku unbuttoned his boxers anyway and slipped his dick out the hole. It wasn't all out, but it was enough.
It was a little weird at first, outright staring at another man's dick, but this wasn't just anyone. It was Deku, his alpha, his /mate/. Who had gotten hard against his ass not five minutes ago. Katsuki willed his blush away and reached out tentatively, fingers brushing the head.
The way Deku relaxed and let out a little groan was reassuring. At least, he supposed, he knew what having a dick was like, so he knew what felt good. Still, his was nowhere near this big. It was thick, too, and for a moment, he was reminded of the time he almost sat on his
bedpost during his first heat. Maybe he'd been onto something back then.

"Kacchan, you don't have to do anything with it," Deku murmured after a moment. Katsuki had stilled in thought.

"Shut up. I wanna try."

The alpha went impossibly redder, but he leaned back against
the headboard, opening himself up to whatever Katsuki wanted to do.

At first, he didn't do much. The velvet skin of the head and firmness of the shaft felt so different from his own, he spent some time just touching softly and getting a feel for it. He exposed more of it as he
worked the whole way down with his fingers, but he didn't make any more jabs about Deku's size. At this point, he was too enthralled with the idea of what this thing could do to him to tease Deku about anything.

Despite how light the touches were, Deku seemed relaxed, growing
more aroused and more pliant in Katsuki's hands. It was an odd sort of exploratory dance they were doing, but both were enjoying it.

It didn't take much longer for Katsuki to find his courage. He sunk down low, gathered saliva in his mouth like he'd read about, and wrapped
his lips around the head.

"K-Kacch--" Deku gasped, biting his tongue halfway through the name, like he was trying to keep quiet.

"Auntie isn't home," the omega reminded firmly. He wouldn't outright ask to hear Deku's voice, but the reminder was enough.
"Kacchan, feels so good," he whimpered, still quiet but unlike before. He arched just slightly, as if to ask Katsuki to continue, and the omega sunk back down in response, testing the waters. His movements stayed slow, but the more he got the hang of coiling his tongue and
hollowing out his cheeks, the more pleased noises he pulled out of Deku.

"Kacchan, you feel so good, let me do it to you," the alpha whined brokenly. He sounded pitifully close to climax already, and the thought of making Deku wait had Katsuki pulling back with a cocky grin.
"Fine," he growled, smile innocent but eyes devilish and playful. "But you're not allowed to touch yourself."

Deku let out a small whimper, but complained no further. It was frustrating, being so close and then being told "no", but he really did want to make Kacchan feel good.
He rolled onto his knees, settling quickly between Katsuki's legs. "Can I, um..." he murmured, thumbs hooking under the blond's boxers.

"Go for it," he snorted, lifting his hips to make the slide easier, and for a moment, Katsuki thought Deku might lose the drool threatening
to spill past his lips.

"You're beautiful..." he murmured absently, almost like he hadn't meant to speak aloud. "Can't believe I'm so lucky..."

"Oi, quit daydreamin'. You said you wanted to make me feel good, yeah?"

"A-ah! Of course, Kacchan!"
The alpha blushed that pretty pink again, but he leaned down with little inhibition, touching in the same experimental way Katsuki had. It was... undeniably odd, having someone else touch his dick, but it definitely felt good. Deku's fingers were calloused, yet somehow
still so smooth. He moved slowly at first, but the passion bled through into his movements as he soon had the head in his mouth and a fist pumping down a wet shaft.

Katsuki, for his part, was a mess. He acted tough, dominant, but the second Deku wrapped his lips around his
dick, the blond lost it. His head was tossed back carelessly, lips parted and a near constant stream of curses drifting out.

"Fuckin' hell, who taught you, haah, how to do this..."

"Internet," Deku responded quickly, laving his tongue over the bead of precum that had gathered
in the short moment he'd pulled away.

"F-fuck--! You're never doing this for--fuck--anyone else, got it?"

"I wouldn't want to," he growled in a possessive way that Katsuki hadn't really heard before. That, paired with the spirited look on his face, had the omega moaning
all over again, fingers shakily reaching for Deku's hair and holding on tight. He needed that mouth on his dick. He needed more.

It must have been pretty obvious that he was getting close. Deku sunk down further, fitting as much of Katsuki into his mouth as he could.
Katsuki could've came from that alone if Deku hadn't picked that moment to smooth his thumb down past his balls and over the folds of his cunt.
His body tensed, and the orgasm he'd been edging toward receded. Fucking hell. He tugged Deku's head upward, and thankfully, he seemed to get the message.

"Not ready..." he grunted, giving Deku a pensive look when he pulled back slightly.

"That's okay. You want to finish?"
"Yeah. Just, not there, not yet."

"Okay." He kissed the very tip of Katsuki's dick in a way that was terribly endearing, too sweet for the location of the kiss.
Just like that, Deku returned to what he'd been doing before, bobbing with more vigor this time. It took a moment for Katsuki to relax, but the increased pace had him howling his mate's name into the empty house.h
He wasn't sure where on the internet Deku had learned how to do this, but he needed to thank someone. Not only did his plush lips feel like heaven on his dick, but seeing Deku's cheeks stuffed with dick was way hotter than he'd ever imagined it could be.
All at once, that heat was pooling again, and Katsuki only had a moment to tug Deku's hair and gasp out a warning before he was spilling his load. For a moment, Deku seemed like he might pull away, but he stayed, swallowed like a fucking champion.
Katsuki made a mental note, post-orgasm, to get this man a dick sucking champion's belt.
"Fucking christ, Deku..." he breathed, limbs going slack in bliss.

"Good?"

"So good. Oh my fucking god."

The alpha chuckled softly and wiped some remaining spit up on Katsuki's boxers. "Good. I'm happy I could make you feel good, Kacchan."
"... did you... ever--?"

"Ah... no. But that's okay! You look so relaxed, I wanna let you rest. Just, um. Give me a couple extra minutes in the shower?"

Katsuki blinked slowly at his mate and smiled, just a small, soft thing.

"I think I can do that."
"Thanks," Deku giggled, cheeks going pink again. "Um... can I kiss you?"

Now Katsuki was blushing. God fucking damnit.
"Yeah," he sputtered, trying to look everywhere except the nerd's eyes.

It was small, totally unsure, but so sweet, the way Deku kissed him. The butterflies in Katsuki's chest grew restless, and it was all he could do to stomp them down for the moment.
"Thanks for letting me do that, Kacchan. I'm really happy you're starting to feel more comfortable."

"Deku. After the nut I just had? I should be thanking /you/."

That had Deku stuttering and blushing, and he practically broke the bed jumping out of it on his way to the shower.
Katsuki could only laugh at his mate. It wasn't all condescending, though, more sweet, a laugh he hadn't let anyone else hear before Deku. Maybe it was the post-coital bliss, but his heart felt so full.
When he finally rolled out of bed to clean up and start his day, the omega took pause. His days had started this week with taking his suppressant pills.

Not today. He was ready. If sharing his heat with an alpha could somehow be even better than the orgasm he'd just had,
then he was ready. Besides, he'd already made Deku wait far too long. He was ready to treat his alpha and come even closer with him.
===========
It only took a day and a half for Katsuki's preheat to start. Everything was taken care of for him, much to his silent relief. Preheat had him jittery, unable to rest for even five minutes.

When they moved back to the Bakugou residence so Katsuki could make his nest, the
omega had keened and insisted they bring Deku's comforter along. It smelled like both of them at this point, happy and comforting from their scenting in bed. Deku obliged, willing to do just about anything to soothe his fussy omega.
Nest building was a whole process for Katsuki. This time seemed a bit easier because he could make the base of the nest out of Deku's blanket, but no amount of clothes felt like it would be enough to fill the rest of it.
He started on the bed and quickly ran out of space. Deku suggested using floor space, since they could move furniture and make a larger area, and that quickly led to the alpha moving everything around for Katsuki. It was a little less comfortable, but Katsuki's omega felt much
better with all that room to nest.

It took a lot for Izuku to get his mate to relax. Katsuki had periods of aggression where he would hiss at the alpha if he got too close, but that allowed Deku some time to prepare in other ways. Mitsuki even took him grocery shopping.
It was immediately obvious when Katsuki's heat started.

Izuku had been in the kitchen with Mitsuki and Masaru, eating dinner and going over the game plan again, when the scent in the air turned sickeningly sweet and a harsh growl erupted from the hallway.
"/Deku/."

"That sounds like our cue to leave," Mitsuki laughed, moving quickly to clean up the food that needed to be put away.

"Don't worry about anything out here, Izuku. We'll take care of things and head out shortly." Masaru smiled warmly at the alpha.
It would've been lost on Deku were it not for the man's soft, yet commanding presence. The scent was only growing stronger, making the alpha's mouth water. His legs were taking him down the hall to Kacchan's room before he could fully process what was happening.
The door was cracked open, and inside, the room was a mess. To anyone else, the chaos of blankets and clothing would look totally disorganized, but to Izuku, it was clearly his mate's nest, built with purpose and care. It was large, too, structured for two, which had
his alpha preening. Kacchan was such a good omega for him.

He took two steps past the door and quickly realized he'd made a mistake in being so comfortable.
In one swift movement, the door was slammed shut, and Izuku was plowed against the wall. Behind him, Katsuki was snarling, teeth chattering with an intense need to bite something, /anything/.

"Deku..." he growled low, humping his bare lower half uselessly against the alpha.
"Kacchan," Izuku gasped, "relax. What's going on?"

Katsuki didn't respond, only growled more harshly and bit down on Deku's shoulder, hard enough to tear the fabric slightly. It tore a warning growl from him by surprise, which only made Katsuki hesitate for a brief moment.
"Kacchan, stop. Are you okay?"

"/Mate/," was the only response he got, voice caught somewhere between a growl and a high whine.

Distantly, Izuku heard a door slam, loud enough that he knew he was meant to hear it, yet it barely cut through the fog.
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