Alpha Kiri
Omega B
LETS GO

Current CW: nesting, fluff, some angst.
Almost certainly ABO NSFW later....well see how it goes.

Its all Kirishimas fault.

Most things are. Katsuki thinks with a grumble. Its always the red head that is encouraging him, pushing him to grow as a human being as he stares at the plushy of himself Kiri had bought him just a week before.

"Awww but babe! Look how soft it is! Its perfect for the nest. Please! I can cuddle with it when were on opposite shifts! Come on!"

And the fucker was r i g h t. It was the softest thing Kat had in the nest. It felt perfect.

But now his entire nest was wrong. He had the same set up for two years. And now NOW the stupid thing made his skin crawl.

His stupid omega instincts insisted it was WRONG. But did he have any idea how? Nope. No fucking clue.

Even taking the plushie out of the nest hadnt worked. It had made him feel worse. So much worse.

So like he said, it was 100% Kirishimas fault entirely that he's standing in front of the hero plushy section in a toy store looking for a matching red riot one.

'Alpha can scent it...for when hes at work.'

Katsuki had agreed with the thought immediatly. The last month the two had been on opposite shifts way more than they ever had before. He got it.

Katsuki was PROUD of both Kirishima and himself as they struggled up the hero ranks, already breaking top 20 even though they were still new to going pro. He was proud of his alpha, his mate, his hero partner. Their life was GOOD.

Yet somehow he knew as he bought this stupid plushie. He knew this wasnt going to be the end of the problem with his nest.

And it wasnt. He tried rearranging some of the outter walls, just a few pieces here and there. But the walls werent right anymore. They werent...soft enough near the mattress. The shape was wrong.

He was tempted to tear down the whole thing. But then his stupid alpha would know there was something wrong with him. Or worse assure him the nest was perfect when it was clearly WAS not.

So Bakugo would idly pick at it, one piece at a time any time he was home that Kiri wasnt.

"So, i was thinking and dont kill me okay but..." Kirishima said about a week after Bakugo had bought the red riot plush, before thrusting two of softest plus sharks at him. "I know youve been picking at the nest Kat but here me out.. i think its the material of these things!"

"Theyre super soft! And i know youre not a fan of cute but like these are so manly! And well they have teeth like mine so i thought....maybe we just need some more! Wha...what do you think?"

He wanted to be mad. He did. He really did.

But his omega wouldnt shut up about how delighted they were.

YES MORE PERFECT SOFT. SMART ALPHA!

"I pick the next ones shitty hair." He grumbled insteads arms crossing over his chest even as a smile tugged at his lips.

He did want more. He...kind of knew that. But...the why. The why still kept him up at night, even as the base of his nest grew to be the arguably perfect.

And so, the urge...was sated. Sort of.

It isnt until the pack gets together on the third Friday of the following month do the dots connect.

"Sorry." Mina says cradling a pink bundle to her chest. "But mom was really pressed for a sitter and I was off so... you guys arent gonna be mad right? I can still kick your ass in Mario-Kart."

"Course not Minz" Kirishima says smile wide as he takes the baby from her arms.

The pup couldn't be more than four months old, and barely covers the length of Kirishima's forearm.

"I want it." Bakugo says abruptly, four sets of heads turning to snap at him.

/HOLY FUCKING SHIT I SAID THAT OUT LOUD, WHAT THE ACTUAL FUCK I HATE STUPID BRATTY ASS KIDS. WHAT THE EVER LOVING NO./

"You heard me." Bakugo said placing a hand on his hip and outstretching his other arm in a give me motion. "Sometime today shitty hair."

His Alpha raised a brow as he passed the baby to his mate, eyes curious as Bakugo pressed the baby to his thundering chest. Why the fuck was he so scared and relieved to have this stupid whelp in his arms? What in the actual fuck?

"Blasty...." Mina said teasingly though, he could detect the faint traces of worry coming from her scent "Don't explode my brother okay?"

"Not gonna explode your brother." He said with a scuff, though he swallowed deeply.

"You all be loud or whatever...we'll nest or whatever.

And suddenly, laying in the nest with Mina's kid brother- he knew what was wrong.

He wanted a god damn pup.

But WHY- Bakugo thought as he nestled the baby between his chest and a hero plush- eyes rapt on the infants large black eyes, and pink fingers that curled around his shirt with a soft coo.

He was- He was-They were barely 20. He hadn't even broken top 10 yet. He'd have-

He'd have to be out for at least a year to raise the whelp. It could be less, but Katsuki realized with anger he didn't want it to be. He didn't want some stranger touching his pup, his teeth gritted and a soft growl coming from his throat.

The baby whined at him softly.

Bakugo bit his tongue instantly "Sorry brat." he whispered, the words barely making its way out of his throat. "I don't know whats wrong with me. I'm not- id be a terrible mother."

"This is a terrible idea." Bakugo grumbled, even as a finger moved to caress a small pink cheek. "You're helpless. I could crush you. Anyone could crush you."

/I'd kill anyone who tried./

Little fingers moved from his shirt to wrap around his finger. The pup was so damn small as he watched as the infant pulled his finger to his lips, mouth wrapping around tip.

His heart thundered in his chest, his chest literally surging with pain, and Bakugo swallowed thickly.

"Cant feed you." He whispered to himself as much as the pup he slowly put a gap between himself and the boy, finger tip still against the baby lips, pulling away slowly as possible as not to startle him. "I'll go see if Pinky brought you milk."

He expected it to be loud, the sounds of competition escalating through the living room. It wasn't quiet, Mario Kart was going sure- but he couldn't hear Mina cheering or smack talking the other boys in the pack. He couldn't hear his Alpha either-

It took a moment before he could see them in the kitchen, to far away to hear- but that had never been a problem for Bakugo. His explosions fucking up his hearing had always been a concern- so he taught himself sign when he was younger, and learned to read lips way before that.

'You don't think it was off?" Pinky mouthed.

'I don't see what the big deal is Mina. Just let it go. Kats is fine with the baby.'

'But when has B EVER wanted anything to do with children Ei? I just don't want you to get your hopes up"

"BY ALL MEANS TALK LOUDER" Katsuki hissed-

loudly. "Or MAYBE GIVE ME A DAMN BOTTLE FOR YOUR BRAT BROTHER BEFORE YOU RUN YOUR MOUTH ABOUT ME SOME MORE YOU STUPID PINK FUCK."

Which in retrospect was probably a bad idea since now the whelp was screaming his head off from the nest in his room.

It had to be hormones. Some weird thing that happened now that he was entering his prime, or an unprompted approaching heat. There was a REASON for this. Because he has never given two shits what anyone thought about him before. Not really.

Not when it came to him being number. Not when it came to his personality, Not when it came to his lack of people skills.

So there's no reason the crying from the next room should be making him panic. There's no reason that Mina insinuating he'd be a bad parent hurt.

If he wanted to be a parent. He'd kick all these extras in the world ass obviously. He just...had to think about this. This was just hormones. BUT if it wasn't. If it wasn't he'd show the fuck out of her. And he'd start by now to tending to this pup.

"Here." Mina says a bit stilted as she hands him a bottle, and Katsuki takes it and immediately dabs it onto his wrist.

"It's to hot you fucker are you trying to scald his mouth." Bakugo seethed, his words much louder now that Mario Kart had paused.

/it be better from me/

/SHUT UP/ he scolded, brow furrowed. /Not our pup./

"I'll make it work." Bakugo conceded, swallowing the embarrassment down. He was being to protective.

"I didn't mean it to sound like you can't handle Kai...you just...this is a different side of you yknow? Im concerned."

'That makes two of us' Bakugo thinks before snarling.

"I'm just making sure you band of idiots don't kill the kid before you deliver him back to his mom."

"Hey hey" Bakugo shushes as he nestles into the corner of his nests, the plushies molding around his form. It's obvious now- that the need was for pups. It's like his nest is helping him, providing support for him and the pup.

It feels right again.

The feeling has his skin lighting up with worry as he cradles the infant in his arm, the bottle slightly cooler now pressed against a hungry mouth.

His chest hurts like his quirk does when he's over extended it.

/wrong. youre not feeding him right. you can do this/

He almost whines. Because he KNOWS better. He cant feed this pup and he knows in an hours time, maybe less this pup will be leaving. And his nest will be wrong again.

Even more than that- how is he supposed to explain this feeling to Kirishima?

The two of them had fought in high school. Bakugo had sworn up and down left and right he'd never have a brat. Kirishima had frowned and asked what about adoption? How- one day he'd like to be a father-

Bakugo had told him that was the worst idea he had ever had.

"I'm going to be number one. I wont have time for some damn whelp. And what about you? hah? you barely remember to water your plant on the window sill!"

"It hasnt died!" Kirishima defended weakly. But Kat could tell he had already won.

"It not dying isnt good enough for a kid."

He never apologized for it.

He never forgot the look on his alphas face either.

His Omega had cried for a week after that. But Bakugo was pretty good about ignoring the impulses and feelings of his baser instincts. Outside of nesting and heats anyway. And apparently whatever the fuck this is.

It isnt much longer after the bottle is empty that there's a knock on his door.

"Hey man. We're getting ready to head out if you wanna say bye." Sero says calmly through the door.

Katsuki knows its not an offer he can refuse, yet for some reason his arms are shaking.

"I'll be right out." He says and he hopes his voice has even a shard of its usual gruffness because Bakugo has never felt more weak than he does in this moment. He'd cut it out if he could.

The walk down the hallway to the pack has never felt like a burden before. An annoyance sure. A comfort, sure. But never a burden. He feels like handing this baby over to it's sister is the worst thing he's ever going to have to do in his life.

Bakugo can feel himself trembling with every step, and there might be blood or drool running down the edge of his mouth, he's not sure- but he's trying so hard not to growl right now. Because he knows- FUCK- he knows he's wrong- but he just cant seem to help it.

It's right before he's in front of them that Kirishima sidesteps in blocking his view from the pack entirely. Bakugo isn't sure what he's doing until he realizes Kirishima looks blurry and he occurs to him that he may not be actively crying but he's getting ready to.

"Pup." Kirishima says softly extending his arms, and this Katsuki can do.

His alpha can be trusted with the pup.

But as soon as the pups out of his arms and into Kirishimas. He knows what comes next. And his pride is going to force him to watch his alpha give this baby over.

"Katsuki. Go in the nest." His voice is a low rumble, and he hasn't turned to face the pack yet. It's not commanding. But the threat of it is there, and Katsuki shrugs at him helplessly.

He cant leave. He can watch. He isnt going to cry. His vision isnt blurry anymore.

He has it together. He always has it together.

He watches as Kirishima reluctantly turns, his voice perfectly cheery and thanks them for visiting. That they'll see them the next moth at Seros.

The goodbye is quieter than it usually is, and when the door finally shuts for the evening the house gets even quieter.

"Well that was something hah?" Kiri says is voice full of fake cheer. He has scent blockers on still from where he hadn't taken them off from his time at the gym, but Katsuki can imagine the scent coming off him.

Embarrassed. Hurt. God, maybe he'd be disappointed.

But all Bakugo knows at this moment is that he's lying. That grin is a lie, or maybe Kirishima's way at an offering. A way to pretend it never happened unless Katsuki brings it up.

His alpha is a saint.

"M'gonna shower. I smell like warm milk and pup." And he almost slaps himself because his voice sounds more longing than disgusted like he was going for. Fucking stupid.

Kirishima swallows at that with a nod. "I'll clean up."

There had to be something WRONG with him. I mean when was the last time he thought about having a kid? A kid with Kirishima's dark hair and sharp teeth with his explosion quirk and loud attitude. It's not that he's thought about how many ways their kids could turn out.

I mean occasionally, sure. Because their kids would be BAD ASS. They'd be incredible, smart and strong and caring and healthy. Happy.

But it's not like he'd ever do it. His dream never included that. Even Kirishima had been a reluctance to add to it initially.. And even then sometimes he didn't wonder if he hadn't done the right thing for the Alpha.

Kirishima deserved doting and soft and...the things he wasnt.

And he had sworn off the idea the day he agreed to date, and inevitably mate the redhaired love of his life.

He wouldn't sign up a brat to the same fate as Kirishima. He wouldn't give anyone else less then they deserved.

Kiri could be happy with the best of Kat. But a kid? No

Todoroki had all but told him so in high school. And for as much as he still disliked the half and half bastard. Todoroki had a fucking point. Some people just...shouldnt be parents.

He was one of those people damn it.

So why is he so sad? His omega's silent. He doesnt have any urge to keep the scent on him. He doesnt have the urge to run after Mina or hunt her down for the pup. So where is this....emptiness coming from? This feeling that he's denying himself and clearly his mate?

The water feels good upon his skin. But it does nothing to end the increasing thoughts in his head.

" I want a pup." He whispers to himself. "But I am stronger than my wants. It's biology. its just biology."

He knows- somehow- that this to isn't entirely the truth.

When Katsuki joins Ei in the nest after his shower, the nest smells heavily of the Alpha- no lingering traces of pup anywhere. Katsuki isnt sure if he's relieved or not as he flops down against his Alpha.

"Sorry." Katsuki mutters against the Alphas large shoulder.

"For what?" Kirishima hums rolling over to wrap his arm around his Omega's thin waist.

"Being weird." Katsuki mutters under his breath looking to the side before forcing himself to look Ei in the eyes.

"It wont happen again."

"I know it wont." Kirishima says with a smile that looks a touch sad.

"And if it does- it doesn't mean anything. I'm not going anywhere."

* * * * * * *

Bakugo calls out of work the next day, and Deku nearly goes into shock on the other end of the phone. Katsuki cant exactly blame the stupid nerd though. He's never called out before.

Still, going to the doctor to find out what's wrong with him is of the upmost importance.

His behaviors not normal, and he meant what he said- he cant be acting like that.

The health practice he goes to is for Pro Omegas. It's discreet and he's never in the waiting room long. He finds himself being ushered from one room to another within minutes before the doctor greets him with a small smile.

"Good morning Mr. Zero- and how can we assist you here today?"

"Somethings wrong with me." Katsuki mutters. "I have this----I think I want pups."

"Congratulations! Would you like to stop receiving heat suppressants and have regularly scheduled heats every month compared to every three?"

"What- are you- NO! Are you dumb!? I dont want pups."

"But sir- you just said."

"I know what I said!" Katsuki snapped running a hand down his face.

"I've never wanted pups before in my life. I just...I havent changed my nest in two years. TWO YEARS. And then suddenly it needed to be....softer. Different. It's wrong. And even though I've fixed it...it's still WRONG."

The look on the doctors face was perfectly blank but he could tell the stupid extra thought he was a moron. He could feel his anger rise as he redirected his gaze to the floor. You don't bite the hands that's helping you. He's a pro. He can power through this.

"And a pack-mate brought their ....baby brother over. And...I needed it. I didnt....I didnt hurt it. I gave him back but I- "

"Why did you say you didnt hurt him?"

"Because I didnt!" Katsuki says eyes glaring up towards her.

"I dont think you would."

Katsuki swallows at that redirecting his gaze downward. "It just..that's not normal for me. Something's gotta be wrong."

"It just sounds like you're entering your prime." The doctor says softly. "Nothings wrong with you, and it doesnt make you want kids. But your heats are at their peak fertile, which admittedly you're a little young- but- your skin is just more sensitive-"

"Have you noticed your skin feeling tighter after work perhaps-? Along with the materials of your nest being to firm? As a male omega this is the ideal time for you TO have a kid- but none of that should make you crave a pup outside of heat if you're not interested."

"But the nest didn't feel right without the pup in it." Katsuki said quietly.

"Well that Mr. Zero- has nothing to do with your omega. That's all you."

****************

"Your heat should be approaching any day now shouldn't it? Your scheduled for your next three month shot next week. Should I expect to see you there? Oh. And before i forget-"

" ill need to prescribe you a pill to take before your heat starts, when an omega enters their prime the affects of the shot aren't going to be enough to combat Mr. Riots sperm alone. So if you decide you don't want a pup it will be important to take it."

"I dont want it."

"Alright not a problem- I'll just put in an order at -"

"No! I...I dont want the pill alright?"

She sighed before sitting down and clicking her pen. "That's alright. But as I said, you should know your odds are higher of conception without, so before your shot next wednesday I'll need to take a sample of your blood."

"....I dont think i want that either."

"It's a big decision....i could prescribe the pill and you don't have to take it. Then we could talk more on Wednesday. This is...entirely up to you."

"I dont want the pill." Bakugo said firmly. "So if it happens it happens right?"

"If that's what you want. Shall I call Tuesday evening?"

"S'fine."

Bakugo feels better on his walk home. Lighter somehow.
This is a good thing. This is a really good thing. His heat is coming up- he'll be able to demand pups from his alpha as many times as he wants and Kirishima wont have the slightest inclining how much he actually wants it.

If it happens. They can talk. He can tell him that he's happy about it. And If Kirishima's for some reason not keen on pups then...well there's time for Katsuki to convince him he'd bdoesnte good at it.

There's time to show him he'd be a good parent.

And if it doesn't happen....he could not skip taking the shot and they could try again next month...or maybe take the shot and try again three months from now...

Except the thought makes him stop. He doesn't want to wait three more months.

Fuck he really wants this.

Does he want it more than being number one?

Maybe....

Maybe not more than being number one.

But.... definitely as much.

That title is his, it will always be there for him to steal from whatever extra has it. It will always be his to rip away from Deku should he dare to touch it first.

But....having a pup....

His pup is the biggest legacy. He could hope for. His pup is his love for Eijirou and the hope for the future- and why had he denied himself of thinking about it for so long when it was so clear that it was exactly what he wants to be doing?

Being a mother didnt mean not being a hero. He could still be a hero, even pupped up. I mean, sure his routine would have to change- but it didn't mean he seized to exist any more right?

Endeavor had kids....though...though that hadn't worked out very well for fucking Todoroki.

Why wasn't this decision coming like all of his others? He could always put his foot down and determine this was the path to take. He made snap decisions in the field in an instant. He was smart ass fuck. He KNEW he was.

So why was this the decision he was caught up on?

The walk up the apartment seems to drag until he breaches the stairwell to the second floor. The scent hits him like a kick to the face and Katsuki finds himself blinking into the empty stairwell. It smells like Ei...his alpha...

Kirishima's scent shouldn't be this strong. Shouldn't be this agitated from their apartment all the way up on the third floor. It shouldn't even be here AT ALL, Ei's supposed to be at work and it smells a little like....pre-rut.

Which is ridiculous. Katsuki thinks even as he bolts up the stairs. Ei's rut is synced with HIS cycle. Ei shouldn't hit pre-rut until Katsuki's in the full swing of heat. It's been that way for YEARS now. So that means something happened...a quirk or....

He slams open his apartment door with a thud, and it only takes a moment to find the Alpha pacing across their home from the kitchen to the living room. The scent that seemed so strong in the stairs would be enough to knock a weaker Omega out.

"Ei." He says sharply, but Kirishima continues his stride, low growls barely coming out from under his breath. "...alpha." He says a little more softly as he shut the door.

*THAT* get his attention and Kirishima locks frozen in place, as he stares at his mate brows furrowed.

"Kat..." he says quietly, crossing the floor in a swift movement, a large hand coming to grip his mates side as he gazes at the Omega up and down.

There's a pause as his hand moves slowly to the lowest part of Katsuki's abdomen, red eyes softening before dropping his hand.

"I need to go to the gym." He says his voice gravely. "Needed to see you first."

"Shitty hair. You cant go to the gym like this." Katsuki feels weak under his alphas gaze. He cant recall a time he's seen his mate this worked up.

It's like there's a fire under his mates skin and Katsuki really wants to touch it.

"Cant stay like this." Ei says quietly. "I'll put on patches. I'll be back."

His talking is clear, but it's getting fragmented and fuck if that doesn't make him slick right up.

His omega isnt happy about this though, shocking Katsuki thinks as he strains to fight his attraction to his mate to listen to his inner self.

/not in sync. why why is alpha early why/

And damn. its rare that Kat finds his omegan self right. but it is.

"Ei..." Bakugo starts as he tries to scent comfort over their apartment. It's hard to override Ei's prerut scent. But as long as he can relax- it should start to help.

"Katsuki dont." Kirishima warns, his teeth sliding together menacingly. His scent is relaxing some but his hands are twitching.

"Just tell me what happened!" Bakugo bites back, anger flashing through the calm he was attempting to put out.

Kirishima is growling now, words breaking apart into something that makes sense to him, but not to Katsuki.. "Alpha. Competition. Stupid. Worthless. Bite him. Kill him. Ungrateful . Worthless. Undeserving. " He's fuming by the end of it pupils dilated fully black.

He breathes slowly as he steps towards Katsuki, and despite his omega telling him to back up, he stays in place as his Alpha's hand rubs down his abdomen, and his face smashes against his neck. He can feel Ei's half hard cock against his thigh, and Katsuki doesnt mean to whimper

But he does- slick slowly sliding down the back of his leg.

"Better. We better." He whispers, even as his teeth grace his mating mark over and over, lightning shooting up and down Katsuki's spine. "I do this. for you. So you wait. Good Omega."

And then his Alpha is backing up

Slapping on three scent packs, and walking out the door, leaving Bakugo horny and confused as hell.

Fucking stupid shitty haired Alpha.

Yeah he's a good omega. Best fucking Omega. Stupid asshole's gonna knot the second he gets through the door when he looks at him....

as soon as Katsuki gets his legs to stop trembling in need first. He'll show the fucker he never should of left. FUCK!

He should have had days to fall into preheat- and then a couple hours before going into heat before Kirishima's work schedule because his Alpha had to have some weird bullshit with some Alpha at work, Katsuki already feels himself beginning to haze over in want.

/He kept touching me here./ Kat says fingers trailing along his stomach slowly. /He's thinking about filling me up. Fucking me on his ridiculously large cock. Knotting me up./

Kat squirms as he throws open the bathroom door. He has to clean any scent off of him except his own.

No Doctors scent. No strangers on the street. He has to smell only like his omega. No lingering scents. HIs perfect Omega. And his big strong perfect Alpha. No other scents. Just them. That's perfect.

He knows Eijirou's gym is only fifteen minutes away walking.

He bets Ei can run it in five.

He's already hard , and this sucks as he turns on the water, slick already staining the back of his thighs. He hopes they have water in the fridge. And fruit.

He hates eating during heat but....

for pups he doesnt.

His body has to be strong and nourished for pups. Ei will give him pups. He's so strong. He's showing someone theyre better. He was challenged. He said they were better. Fuck fuck fuck.

God Katsuki hates how the need makes him foggy.

But he loves how his body aches. How he aches for Eijirou and how he fits perfectly next to Eijirou...

How he might just kill him if he cant find his fucking knotted dildo in the next five minutes.

That's the thing about heats that happen that Katsuki hates. He was in the shower, he thought a minute ago, but now he's ransacking the apartment with slick leaking out of him.

So painfully empty and clenching on nothing.

He smells just like himself.

And he thinks he hears the shower still running.

But fuck- his dick is hard enough to put unbreakable to shame, and he's damn well ready to get on his knees and present in the hallway.

He finds himself stumbling to the shower with trembling hands to turn the water off.

His omegan instincts are screaming at him, howling to find that silicone knot that's buried in his closet somewhere for the nights Kiri's on patrol.

It be so easy too ransack the bedroom and crawl into the nest and take care of himself until his Alpha was back to do it properly.

But this was an opportunity to prove himself to his mate. An opportunity to show Kiri without words he'd be a good mum.

His vision is blurred with how bad he wants as he walks naked, water or maybe sweat with the fever he's running, down his skin. He approaches the threshold just shy of their front door.

His entire body is trembling as he sinks to his knees back to the door, presenting.

His body is an absolute live wire, shaking almost violently as he presses his head against the tile, a trembling exhale coming from his oversensitive form.

/knotknotknotknotknotknot/ chants in his head, like an addict desperate for it's next fix.

But Bakugo won't give in.

He's going to wait. He wont touch himself at all. He'll show his Alpha how much self control he has. How much patience, no matter how bad it hurts he'll SHOW he can do anything for thier pup.

His legs twitch helplessly across the tile, and he can see the door from between his legs, though his swollen cock makes the view a little less clear with it's throbbing intent bobbing forward desperately.

His dick is flushed a hot red, and pre is slowly dripping down his length

His hands twitch- just one touch, one smooth glide would settle some just a little of the fire.

He bites his lip hard and screws his eyes closed shut as he hears a glop of slick land almost harshly against the tile of the apartment.

One finger is all it take, if he just touched himself a little he'd cum. That's all he needs- just to take the edge off- he could still be good for his alpha if.

/No/ Bakugo hisses to himself fingers curled into a ball even as his hips subtly pitch forward in the air.

/Im a good omega. I'll wait. We'll prove it. Than alpha will give us pups./

He doesn't usually think of his omegan instincts as an entity, but right now with how badly his body aches and wants. It's almost hard not to.

Because what Bakugo wants more than to be knotted- what Katsuki wants more than anything- is he wants to show Ei he'd be good.

He'd be such a good mum. He'd protect their pup better than anyone in the world.

Ei will see. Ei will see how he can control himself.

Even as another glob of slick drips to the floor, and Katsuki whines head digging into the tile so hard he knows it must be red.

He turns his face to the side, cheek slick against the tile floor and he wonders distantly if he's crying.

He can imagine his Alpha's intake of breath, reeking of sweat and victory as he stares down at Katsuki when he walks through the door.

Bakugo can imagine the way Kirishima would hold him down because the minute he smells his alpha he knows he's going to be a squirming, begging mess pride be damned.

It's only Kirishima.

He's safe with his alpha.

Submission is the ultimate trust. The patience the ultimate proof. His mate will understand, he has to understand.

He can almost feel the rough hand of Eijirou on his shoulder, the thick head of his cock pushing into his opening.

Is he that desperate he'll cum to thought of his mate penetrating him? His head is so foggy and he straightens his arms up, picking up his head to stare between his legs once again, pointedly ignoring the spot of drool and tears he left where his head previously rested.

His cock is swollen a vicious stream of pre connecting his erection to the floor, slick trailing down his thighs, a significantly larger puddle where to much movement would easily make him slip.

If his thoughts were clearer, he might be embarrassed.

Katsuki's body feels weak from not touching, his arms trembling holding his presentation properly once again.
He wants to cum so badly. Where is his alpha? How long does it take? How long has it been? How long is long enough?

Bakugo doesn't hear the door open up, but he smells him. He smells his Alpha and his body tenses in want. Has he lost his mind? His Alpha isn't here if he was surely he would have... “Kats.....have you-”

His body convulses, the tension in his gut snapping so hard it physically hurts as white hot light blinds his vision. Kat's throat hurts his voice is tearing out from him so hard as he orgasms hard across the floor, his limbs jerking blindly until the orgasm slowly tapers off.

Bakugo's floating midair somehow because his arms aren't holding him up anymore, and he wonders if this is an out of body experience, before he registers that his alpha is there and pulling him into his warm chest.
Kiri's smells a little like blood and metal.

“Holy shit, Kat- that was the hottest thing I've ever seen- good Omega, perfect Omega. Did you wait there for me the whole time? You're so good.”

His voice isn't as broken, and under different circumstances Bakugo would absolutely demand to know where the alpha went- what had him so angry, but with Ei littering Katsuki's tear stained face in kisses, it's being shoved elsewhere, much farther back in his mind-

as he manages to wrap trembling arms around his Alpha. He swallows down his request for pups by offering a quietly whispered “nest?” Kirishima obliges immediately, eyes hungry as he cradles Katsuki closer to his chest.

The desire to be bred is still as strong as ever- he knows the sight of him presenting and waiting for his Alpha has Ei wired up but he's not sure Kirishima understands.

It's....a dilemma, because Katsuki doesn't usually have to use words with his Alpha. Kirishima has always been so in tune with all of his wants and needs that while he encourages Katsuki to use his voice- he doesn't have to.

This time, Katsuki's afraid he's going to have to.

The plush of the nest feels so good as he's set down gently. Ei's eyes are almost black, and he's making a noise deep in the back of his throat that makes Bakugo feel like prey as he stares up at his Alpha.

“Ei.” Katsuki hisses as he tries to ignore the heat rising once again through out his body. “Alpha please.”

He's not even sure what he's asking for.

Ei's arms are shaking as his hands come to Katsuki's face, and tilt his jaw to the side inspecting his mating bite quizzically. “Do you remember when I gave you this?” His voice is rough and ragged and logged with an emotion Katsuki cant quite place.

He nods. Of course he remembers. They were still in high school when it happened. Katsuki had resented being an Omega- because of course he had. It was a threat to his dream. It was a hindrance, an inconvenience, it was weakness.

That was how he had thought as he had designed patches from the sports department to hide his secret. It had been a trying time, on both him and Eijirou. But the Alpha had fought for him, physically, emotionally.

Ei was the reason he had the ability to mother children. It was his sperm that helped his body grow a fully functional uterus before graduation. It was Ei who was able to give Bakugo what he needed.

Katsuki's confident like the growing slick staining the back of his legs, his alpha was going to do the same again.

“Yeah.” Katsuki breathes on a whine, hips shifting helplessly against the nest. Every soft flush cradling his body and lighting his skin on fire at the contact. It feels so good. Incredibly amazingly good in a way his nest has never felt before.

“Mate....your mate...i am...” Bakugo babbles as Ei slots his teeth against the mark against his gland.

“Gonna breed you Kat.” Ei mumbles around his mouthful of skin. “Gonna fuck you full.”

Katsuki's eyes widen as his Alpha leans over him, he can feel his mate's quirk knot already swollen thick, brushing between his slick stained thighs. It's been a while since his Alpha has popped both.

As a teenager, Ei hardly hadn't had control over his knots- his body determined to hold out until his Omega had cum, his body determined to breed his Omega positively full. But as the Alpha gained more control of his quirk,

and his strength was tested and he grew into the man he is now- the quirk knot became more optional than necessary.

It's pride that fills Katsuki's chest now as he stares down between his legs at the swollen knot, a couple inches from where his actual Alpha knot would form.

Katsuki's presentation had done that, Katsuki waiting for him so good had his Alpha's eyes completely black, cock viciously hard- it was all because of him that Kirishima was losing control.

That was the best head rush there was.

He expects his Alpha to maybe eat him open from behind, stretch him wide with thick fingers, make him writhe for his cock.

He has plenty of times before, so when Kirishima shoves himself in up to his quirk knot in one brutal thrust, he finds himself screaming body convulsing about the thick erection inside of him, as slick drips out of his hole to slick down his Alpha's quirk knot, down past his-

heavy full balls.

Bakugo's' cock jumps painfully, and he can feel himself squeezing rhytmatically on his Alpha's cock.

“So wet.” Kirishima growls, thrusting in slow deep thrusts, that stretch Bakugo wide. “So good. Perfect Omega. So ready for me.”

“Alpha.” Katsuki says feeling himself slip deeper into his heat, his entire existence focused on those knots bullying their way into his slick hole, pumping him full of virile Alpha cum.

And what that could mean for him now that his body was developed, now that their were no contraceptives in the way, now he can allow himself to say what he always says during heat- but has never allowed himself to want- to mean- “Alpha..E-Ei... I neeed....”

Kirishima nips at his shoulder rocking faster, hands digging sharply into Bakugo's hips. “I know.” Kirishima breathes heatedly as his quirk knot forces his opening wider, forcing his body to accommodate his lovers thickness.

Bakugo can feel himself trembling once again, as his arms give out and his face crashes into the soft plush of his nest. He wishes he could rock his erection down into the sheets, the urge to cum mounting now that his body has received a knot.

“shhh Kat.” Ei says affectionately, “Don't be greedy.”

Katsuki didn't even know he had been whining. He wishes he could explain the fire in his gut that's hotter and more desperate than he's ever felt before.

“Omega cums first....” He slurs eyes rolling up towards Ei. “Breed better. More pups.”

Katsuki isn't quite sure what he's uttered, or what Kiri says in response but the Alpha's teeth are digging into his mating bite and his thrusts are no longer deep and slow, but hard and fast,

his true knot, pushing roughly against his entrance. He can't help but whine, desperate for his Alpha's second knot, a panicked feeling lancing through the sweet fire in his gut at the fear of it being unable to fit.

Kirishima lets a hand leave Katsuki's hips to pump his weeping red erection, it only takes three pumps, and Katsuki is cumming with a scream just as Ei manages to force his second knot inside his mates body.

Bakugo swears he can feel the warmth pulsing through him, and he's not sure if it's possible, but as his stomach begins to swell, he swears he can feel himself cumming again before his first is even finished.

He lays dazed for a moment before Kirishima is rolling them both more comfortably onto their side. His mates hand coming to affectionately rub over the small swell of his abdomen, Katsuki clenches tighter at the gesture, and Kirishima groans into his neck, licking at the blood he

had drawn from his mating bite.

Kirishima whispers. “This would definitely have you pregnant. It's been so long since i've...”

The words are like a smack across Katsuki's heat induced brain, rousing the fogginess of sleep as he turns to stare at his mate over a shoulder offended. Would? Why wouldn't it?

Kirishima scents across his neck affectionately, licking at his jaw, and grinding his knot in deeper. It makes Katsukis brain fuzzy as he purrs affectionately settling comfortably against his Alpha's outstretched arm all previous words forgotten.

When he closes his eyes, he dreams of the pups he vows to himself he's carrying.

******************************************************

His heat goes by in much of a blur it always does, Kiri thoroughly fucking him into the nest and him, begging for more.

But now that it's over, Bakugo doesn't feel relaxed. He feels anxious. He should smell different right? He should know. He should be able to tell if he's pregnant shouldn't he?

The idea that he isn't leaves a scowl on his face as Kirishima removes articles of clothing and plushies that need to be cleaned from their intense mating.

“What's wrong babe?” Kirishima hums, “Do you need anything? Do you want me to draw you a bath? I'm sorry that I maimed you up a little more than-”

“Shut up.” Bakugo growls, arms crossed over his chest to glare a whole at the wall. “I loved it. You were perfect as always.”

He knows he should say something to him here, something about his desire for pups, something about the fact that he no longer has a form of birth control, something about the fact that he's sorry he's an asshole for what he said back in high school.

But he can't seem to make himself say any of it, instead however a faint flicker of a memory resurfaces- and this is what he chooses to go with.

“Your rut was early.” Bakugo says turning his attention towards Kirishima firmly.

“Why. You also left me alone after sending me into heat early.”

“Oh.” Kirishima says, a frown tugging his lips as he drops the soiled items by the door to make his way back into the semi formed nest. “That's what the distress is about.”

Katsuki is reminded why he hated being an omega- how strong his scents are even without trying. God help him should he ever start scenting out his desire for pups not being in heat.

“It's ...kind of embarrassing. I don't...I haven't had the chance to think it through yet.”

He says, and this is so unlike Kirishima that Bakugo leans closer, a hand gripping Ei's knee tightly. “TetsuTetsu got some random pregnant.”

It doesn't answer any questions, but Katsuki still feels like he's been hit all the same, an intense anger and jealousy coursing through his veins that he can't even begin to describe. He says nothing as Kiri heaves a breath.

“He was talking about how he kind of thought maybe they should get rid of it. And I just...lost it.”

Katsuki's not sure what's happening to him, but there's a static in his brain now that wasn't there as Kirishima keeps talking.

He feels this urge to, to run, to protect to- to to- he wants the pup. He doesn't know this whelp, this whelp isnt anything but- but cells yet- not even, not even his cells and yet...

“It's not like I had any right. It had nothing to do with me yknow? It's between them. And Really its. Its their choice. Well. His his partners. Not his. They're non-binary and I-”

Katsuki wants a pup. How could they get rid of it? When he wants it so bad? How could they be so be so be so-

Katsuki clears his throat and shakes his head. “I get it. It just....it just feels weird.” He pauses when he notices Kirishima looking at him before tacking on. “Because our cycle was close.”

“Yeah...” Kirishima says with a nod. “Yeah..you're probably right.”

********************************************************

The doctor tries to reassure Katsuki that while Omega health has improved greatly, that there's still limited information on male Omegas and that just because he can't tell instantly like most doesnt mean he isn't.

But it also doesnt mean he is.

Besides, Katsuki is certain he'd know. He knows his body better than anyone. He isn't.

So he goes about telling himself he didn't want a pup anyway. He knew he wouldn't be a good mother or whatever. Still...he can't bring himself to make the appointment for suppressants.

He throws himself into training before work, and again after work. He throws punches after punches onto heavy leather careful not to detonate the bag. He catches Deku watching him from the doorway, his reflection intensely analytical as always.

The Alpha never says anything though- always leaving after a moment without a word. Bakugo isn't sure how he feels about it, but he doesn't allow himself much time to really do anything other than acknowledge it. The feel of the his fist connecting to the bag is therapeutic.

It takes his mind away from his empty nest.

His phone rings when it reaches the second hour of him being off. He knows it's Kiri without having to look, his arms ache and he stretches them above his head before answering.

"Hey I -"

"This is the third night in a row Katsuki." Ei says before Bakugo can get anything else out. There's something primitive and dark and possessively alpha in his voice and it's almost enough to make him feel bad.

"The fuck Ei "

"I just dont get it! You've been going earlier every day, and now staying late every night. It's been two weeks. /what/ happened?"

Bakugo cant make himself mouth his failure. He should have been a mom. They could have had a family. It would have been their legacy-

They would have been so happy.

Bakugo swallows the lump in his throat at the delusional daydream.

"I'm not going to beat Deku sitting on my ass at home."

He knows he shouldn't, but he cant manage any more than that as he ends the call. He was going to wrap it up, but thirty more minutes won't hurt.

Bakugo is exhausted by the time he gets himself up to his apartment. He's off tomorrow, he figures he can make it up to Kirishima then- the Alpha works late- he can wake him up with some morning sex and brunch. Maybe they can work out at their gym they frequent outside the agency

Maybe, that'll make the Alpha calm down about his distraction. Then they can game and Kiri will have plenty of time to nap before going back in. It's a solid plan as far as plans go.

What he's not expecting when he walks through the door however, is Mina to be there with her kid brother. The little helpless pink whelp that Bakugo definitely doesn't want anything to do with.

He's not sure if he can sort through all the emotions that run through his system. He wants to be mad, it's the easiest to deal with- but the unfairness of it is just settles on his skin like lead.

"Hey blasty" Mina chirps happily, and Bakugo manages to grunt his acknowledgement

He's trying to not look at the baby, he's trying to avoid it so hard he barely notices that Eijirou is barely looking at him. He might have noticed his Alpha irritation had he not been patched as heavily as he was. He must have been rank if he felt the need to double up for Mina.

Katsuki wants to apologize, he does. But he can't seem to make his mouth do anything its supposed to do.

"Why do you have the brat here?"

"Why ya want him?" Mina says raising a brow as she holds the baby up under the armpits.

The twerps head support has gotten stronger since he saw him last. He's gonna be so tough. He longs to run a hand over his cheek, to curl up with him and feed him agian in the nest- but also- the loss is to fresh and he just- can't. He has to get over it.

This dream is dead. There's only being the number one hero now.

"Nah." Bakugo says. "I'm going to shower. Later."

Its stupid. Bakugo thinks as he locks the door and rips clothes from his body.

It's stupid. He thinks as he rips scent patches off his neck and yanks the water on as hot as it will go.

Its stupid, that he feels like he might actually cry over something like this.

Maybe if he takes his nest apart tomorrow night, if he makes it less soft- less warm- back to how it use to be- maybe he'll be able to move on.

Everything aches, and his slow crawl towards the top hero is maddening.

He's an omega- yes- but he keeps pace with stupid Deku and his 86% quirk. They're e sailing up charts at an alarming rate despite their age. If he can just push a little bit harder- a little bit farther- he'll taste something else other than this gut punching agony.

He's not sure how long he spends in the shower- he lets his skin get wrinkled and the water run cold though. When he emerges towel around his waist, the living room looks empty and Bakguo sighs as he moves towards their room to grab pajama pants and toss the towel in the basket.

He assumes Ei is in the nest, but a quick peek into the dark room assures him his mate isnt in there- and hasn't been in a while. Panic jolts up his spine as he moves quietly, but faster than normal to the living room- and that's when he sees them.

Mina's gone- but the baby isn't. Curled up on Ei's chest, the Alpha's large hand holding the baby down gently but firm. The pup sucks his thumb but otherwise content on the Alpha's chest. The emotion clogs up Bakugo's throat instantly. The two have their eyes closed-

Asleep- or close to.

He knows he needs to control his scent because if he doesnt the feelings of distress stirring up in his veins are going to wake them up. He breathes slowly and turns his gaze towards the kitchen. He's not going to cry. He didnt earlier.

He sure as fuck isn't now.

"It's okay to like this and not want it for yourself." Kirishima says scaring the hell out of Katsuki. The Alpha's voice is soft as to not destroy the pup- and his eyes is still closed as if he knows looking at Bakugo right now will be to much.

"You know i'm happy with you right? No matter your hero rank, no matter if you want kids or just want to hang out with them occasionally. I just...want you. "

"Yeah." Bakugo croaks weakly. "I know. Youre...you look good like that....with the pup.'

"So did you." Kirishima whispers as if he's afraid to say it. "When the gang was here last time."

Katsuki doesn't look at him. "you know I...I cant give this to you right." the even though I want to doesn't come out of his mouth- but Bakugo feels it so hard hes not sure how-

it didnt.

"I know." Kirishima says, followed by. "You'll get to the top babe. No more night training, not without me."

"Okay." Bakugo whispers. "Okay I can do that."

And Katsuki isnt sure if he can, but he'll try. For his perfect understanding Alpha, he'll bury this loss down farther. He'll call the doctor for his suppressants next week. He won't disappoint his mate like he has himself. Not again. Not any more.

***

The soonest the doctors could get Katsuki in was three days before he would have gone into heat. Which really, is stupid. He should be able to order it in and have it tomorrow but whatever. He'll probably have shitty cramps from the pheromone shit he's fucked with-

but he'll deal.

But the beginning of his third week since his heat with his mate- Deku starts acting weird as fuck on patrols with him. He tried to ignore it, he did- because he's a PRO now and he needs to be a certain level of....patient.

but as they move on to third block the nerd is baring his teeth at any traffic that crosses them, hands twitching at his side.

"What the fuck is wrong with you? You have rabies or something? Fuck."

"I just...need you to walk on the inside. Not. not by the road." Deku mutters. "It's driving me nuts."

"What the fuck ever." Katsuki growls, stepping around Deku to the inside of the sidewalk next the buildings. "Are you happy? Weird ass Alpha."

The twitching does stop then. But it's an every day thing. The stupid nerd can't let him walk on the outside without twitching. He wonders vaguely if Deku's dying and he should say something to Almight or Uraraka.

It's not that he cares! It's just...odd.

But then again, Deku's always been kind of odd. Still, it's sort of odd because its around the time Eijirou starts insisting on escorting him to work and picking him up directly from the agency after his shift.

That one isn't odd though.

The last two weeks Katsuki is big enough to admit he has put some strain on their relationship with - well it doesnt matter. He knows Ei just wants the reassurance that he wont work himself to death, even if he does feel kind of like he's being coddled.