Kirishima throws back his head, a loud laugh sounding. "Hahaha, thanks for the offer, man. But Imma go bother Bakugou!" He takes the stairs two at a time, forcing Denki to kick it into overdrive if he wanted to catch up.

"Are you trying to- /ha! slow down, man!/ --trying to die? It's after nine! He's probably been asleep for hours!"

"Yeah, no doubt! But I have a key. Plus. I like waking my bro up by slipping into his bed and touching him with my co--"

"KIRISHIMA!" Kaminari shouts, grapping his heaving chest. "BRO! I DON'T NEED TO KNOW THAT!"

Kirishima chuckles. "My /cold feet/, dude. I definitely was going to say touch him with my cold feet."

"Suuuure," Denki drawls, slipping in the open stairwell door to the common room.

"Like you wouldn't want to touch him with your cock, too."

Kirishima's face flames, and he drags a hardened hand through his hair, ripping out a few strands. "Bro. I told you my crush in //confidence//."

"And I haven't told anyone!" Kami says indignantly.

"Yet."

"Anyway, see you tomorrow!"

Kirishima doesn't slow down on his way up to Bakugou's room. His legs are bouncing while he waits for the elevator. His hands are twisting in his jersey.

Like a crack addict looking for a fix, Kirishima is JONESING to see Katsuki.

They've been apart the WHOLE day. A rarity for them.

Kirishima had a workout with Tetsu this morning, Katsuki met his mom for lunch. Kiri went out with Denki to the mall, Katsuki slammed the door in his face when he asked if he'd go too.

It's been all day!

He needs to see his bro.

Even if that means pissing him off because he's woken up.

Kiri stops at his room. He showers quicker than he ever has to get the gel out of his hair and refresh his scent. He dresses in just a pair of padded boxers (just incase) and a tanktop, his usual sleepwear when he's next door. He grabs Bakugou's key and steps out into the hallway

For a second, Kirishima thinks he hears music coming from Bakugou's door. But it must be Shouji. It's almost 10:30.

Katsu's probably been out for hours, passed out on an open studybook.

Kirishima creaks open the door, aiming to be stealthy. Dimly he realizes that Bakugou actually does have music playing and is that a black light?

And where's Bakugou's scent? Why does it smell like cloves?

What... what's going on in here?

"Shitty Hair. Hey." Bakugou says nonchalantly, like he could care less Kirishima's barging in after curfew. He just looks back down at the manga in his hands, reaching inside the chip bag at his hip.

Kirishima doesn't know what he's//fucking// looking at.

"Kirishima. Hello."

Kirishima blinks.

Blinks again.

"Uh, hey, Shinsou. What are you doing?" Fuck. "I mean, uh, what's up, man?"

Shinsou.

In Bakugou's room.

In Bakugou's bed.

In HIS Alpha's sheets.

Sure, they're just sitting next to each other. But they look fucking /cozy/, their legs almost touching as they eat chips from the same damn chip bag.

And ARE THEY SHARING EARPHONES?!

"It's almost eleven." Kirishima says curtly, not giving Shinsou a chance to respond to his question.

Katsuki raises an eyebrow. "So?"

Kirishima has to stop his pout. "So I'm tired."

Katsuki tchs, before flipping a page in his book. "So turn around and go to bed, Shitty hair."

Asdfjgk tUrN aRouNd aND gO tO bEd?!?!

Kirishima bites his tongue until it bleeds so he doesn't say something stupid and whiny like, "I wanna sleep here!" Or worse, something bratty like, "Make //Shinsou// leave!"

He clenches his fists, begging his body to not release any scents, territoral or otherwise, that would give him away.

Bakugou still isn't looking at him, and Kiri doesn't really know what to do. He barely resists stomping his foot.

"I'm not *that* tired," he finally grumbles.

"Kay." Bakugou says.

KAY.

LIKE IT DIDN'T MATTER IF KIRISHIMA STAYS OR GOES.

Each dorm room is equipped with a Twin XL bed. So between, Bakugou, Shinsou, and the chip bag, there's no room unless Kirishima wants to lay at the foot like a damn dog.

Of course there's the desk chair, but that feels like he's relenting his... best friend status with Katsu.

"Why does it smell like smoke in here?" And not like Katsuki's campfire smell either.

Shinsou pulls a lighter and a pack of smokes from his skinny jeans. He pulls a cigarette from the box and sticks it between his teeth. "It's a mystery." He says.

Kirishima's eyes narrow. He's not usually this grumpy, but it's late and someone else is in his Alp--, in Bakugou's bed.

It feels like.... like a betrayal of friendship!

Yeah!

"You're letting him smoke in here?!?!" Kirishima shouts at Katsuki.

"Pipe down, damn. Yeah I'm letting him smoke in here. 'Sides, it smells nice."

Kirishima sputters. Who is this man?!?! "What about getting in trouble?!"

Katsuki's eyebrow raises. "How? My room is smoke detector less. You know this."

Kirishima surpresses a growl, and starts thrumming his fingers across the desk.

He knows he's scenting his corner of the room like crazy, but neither boy is saying anything.

Which is rude!

As Alphas they should want to soothe him!

Kirishima's knee hits the desk and he's tired of sitting. "Fine!" He says, jerking to a stand. "I guess I'm going to my room."

Shinsou's watching him with calculating eyes, as he draws on his cigarette. "Why did you come over again?"

Kirishima //seethes//.

WHAT IS THIS GUY'S PROBLEM?!

AND WHEN DID HIM AND KATSUKI EVEN BECOME FRIENDS ANYWAY?!

"Katsu!" Kirishima snaps, jerking his bath towel off his shoulders to dry his hair. "Are you gonna walk me to my door?"

Katsuki opens his mouth to response, and it BETTER be a yes--

But Shinsou interupts again. "Why? You scared of villians? It's an inch away."

Bakugou lets out a soft chuckle as he leans over and INTENTIONALLY bumps shoulders with Shinsou.

Kirishima EXPLODES.

Before he can stop himself, he shoves the desk chair out of his way so forcefully it slams into the floor. Not wanting either of them to see his red face or smell his distress Kirishima just runs for the door.

BUT because he's a petty bitch, before he slips away, he takes a page from Bakugou's book and lifts up his middle finger.

~~~~

"Yo, Shitty Hair," Bakugou calls from his locker in the dressing rooms.

Kirishima's been ignoring him for most of the day and even though his eyes were usually glued to Katsuki while he changes, today Kirishima hasn't looked up once.

He's still mad, okay.

"Hey," Bakugou says directly from his side. His warm hand smooths over Kirishima's bare back, and Kirishima's shoulders instantly relax. "You listening to me?"

"Yes," Kirishima breathes out, before inhaling the perfect scent of his Alpha.

Maybe last time was a fluke. His Alpha is all about him now, eyes focused on Kirishima's mouth like he's dying to know what Ei tastes like.

"Class B is training with us today," Katsuki starts.

"Yeah. I know..." Tetsu already told him.

"Yeah. So. I was thinking Shinsou could train with us today. His quirk is fucking /strong/ and I need practice against all quirk types, not just regular strength types--"

His fingers are digging into the metal of his locker door before he can stop himself.

Shinsou. Again.

What was Bakugou's obsession with him?!

Kirishima snarls, his teeth snapping close to Katsuki's face.

"/REGULAR/ strength types? Are you implying my quirk isn't special?!"

Bakugou's gaze slits. "You know I'm not. Fuck, what's your fucking deal lately? You're acting like a moody jealous bit--"

Omegas are not supposed to cause a scene.

Omegas are gentle, soft.

Good for breeding and sitting silently next to their Alpha's.

They spoke when spoken to, and definitely, under NO circumstances can they EVER punch their prospective mates in the face.

Oops.

Kirishima watches from an out of body experience as his Alpha's head whips to the side.

His knuckles hurt, he really hadn't held back and he's not used to punching someone without his quirk.

Actually he's not used to punching someone at /all/ unless they were a villian--

And oh gods. What's wrong with him.

Why did he do that?!

Katsuki's cheek is already turning red, and looking at it makes embarassment and shame flood Kirishima's insides.

Suddenly he feels dizzy.

"Katsu, hey, I'm sor--"

Kirishima's breath explodes out of his lungs as Katsuki grabs his wrists and pins them hard to the locker.

His scent is *pissed off* and *dangerous* and his quirk is popping off.

A threat.

Ei gasps, trying to breathe through the impact.

"I didn't m-mean to-" he stutters out, his body starting to quiver. He's not scared, but something's wrong.

He's... he's NOT scared.

But..

"Alpha," he says softly, trying not to flinch at the fury in Katsuki's eyes. "I'm sor-"

Katsuki's head whips forward, and for a split second while his forehead his whipping toward him, Kirishima thinks he's going to be headbutt. Which is going to hurt because he totally doesn't deserve to use his quirk in defense.

But no.

No.

Katsuki doesn't headbutt him.

His sharp teeth sink into Kirishima's neck.

A bite.

An Alpha bite, forcing submission.

Kirishima's voice breaks out a shocked moan, and he's pathetic, he knows, but it's /BIOLOGY/ that makes his knees buckle.

Katsuki's drops his hold on his wrists like he's made of hot coals.

Kirishima crumples into a heap, gasping against the floor, fingers pressed into the wound on his neck. His legs are scissoring against his will and he pulls back his fingers to look but there's no blood just..

Slick.

No wait.

Fluid. From his scent gland.

Kirishima looks up at Katsuki with watery eyes, his lips trembling.

Bakugou wipes his mouth with the back of his wrist and spits, like he's trying to purge the flavour of Kirishima from his tongue.

He looks...

Powerful.

/Alpha./

And for the first time in Kirishima's life, he hears his Omega speak.

//ALPHA. MINE.//

cw: feral episodes

Kat's clearly struggling to keep his temper under control. His arms are shaking, his fists are clenched and he keeps spitting

He reaches for a water bottle, Ei doesn't even know who it belongs to.

He squirts the entire thing in his mouth, rinsing and spitting until it's empty.

Neither of them say anything.

Katsuki, too busy trying to regain control.

Kirishima, limbs and chest too busy filling with....

Something...

...Heat...

"I .. don't I..."

Shit. Was Bakugou dripping water on him?

Oh... no. He was crying.

Okay.

Katsuki's face immediately pales, and he crouches down to Kirishima's level. "Fuck, Ei, I'm sorry. I fucking. I didn't, I didn't fucking mean to!"

It's not clear who reaches for who, but suddenly Kirishima is being wrapped in Katsuki's strong arms and his scent is everywhere...

...hot....

"Sorry. I'm sorry. I didn't mean to! My Alpha, he told me to! Told me to bite you to calm you down and now you're crying, oh gods, are you hurt? Do you need recovery girl? You're shaking. Ei, I'm sorry, I'm sorry I--"

//Help//.

The new voice in his head startles him. It's loud. But serperate from his own thoughts. Like another person in his mind.

His Omega.

Obeying, Kirishima brushes fingers across Katsuki's wet cheeks. "'s okay." He slurs. "I'm okay."

It hadn't even hurt.

Not really.

Infact, it had felt....

Kind of really fucking good.

"Hey, Katsu," Kirishima says softly, pressing his face into Bakugou's neck, desperate for a tiny hint of his scent.

Fuck. He's starting to sweat. That can'tbe normal. "Why'd you spit?"

Katsuki's words are a rumble. "Tasted too good." He rubs his cheek against Kirishima's. "You smell too good. Are you okay?"

No. No he wasn't.

"Yeah," he says breathlessly, surging up to press a hand against Katsuki's shoulder until he falls to his back on the dirty locker room floor. Spreading his knees, Kirishima straddles his hips, shifting until his Omega sighs out in comfort. "Yeah 'm fine."

Katsuki's hands flex on Kirishima's hips.

"You sure, you /ah fuck watch it/--"

Kirishima purrs, his spine arching as he's helpless to do anything but rock into Katsuki's growing erection.

His Omega hums. Then begs /claim him/.

Oh.

Oh.

"Kirishima," Katsuki says brokenly, trying to stop the slow grind Ei has going on top of his trapped dick but also trying very hard /not/ to stop him. "You don't look okay."

Kirishima's hair plasters to his flushed face when he nods. His scent is filling the room. Dangerous.

He rocks forward again, his tongue rolling out of his mouth, drooling dripping down his chin.

"Katsuki, I think I'm--"

Katsuki watches in complete shock as Kirishima's thighs tighten around his hips and the Omega practically SCREAMS.

Slick wets Kirishima's pants, soaks through the material and dampens Bakugou's too.

His eyes are rolling back, his nails are digging into Bakugou's shoulders and it fucking looks like he's having a seizure.

Katsuki fucking LOVES IT.

So much so that his knot is threatening to pop.

When Kirishima can talk again he mumbles, "Presenting. I'm--" another orgasm steals the words from Kirishima mouth and the smell of his arousal is so fucking thick that Katsuki's Alpha howls.

Presenting.

In the fucking locker room.

Oh thank the Gods, Kirishima thinks deliriously. He's not an asshole. His body just hates him.

His HORMONES were the reason he acted so awfully.

Pure panic is the only way to explain the look on Katsuki's face. The expression would be funny if the situation wasn't so dire.

"You're having your first heat, HERE?! NOW?! Tell your Omega to stop it!"

Despite just coming twice and already working himself toward a third, Kirishima's able to give a breathless laugh. "You don't--mmm- know much about Omegas, d-do you?"

He feels like he's going to DIE.

His lower stomach aches, his cock aches, and he's so fucking empty.

"Eijirou!" Katsuki's fingers are steel bands on his chin, forcing him to look down at him. "Tell me what to do. And hurry." The loud sound of his teeth grinding together echoes in the locker room. "Before I do something stupid./ he hisses.

Kirishima whines. Loud and desperate. He doesn't know what he needs! He just needs more of this! Please more!

With fast, jerky movements, he reaches for the waistband of Kat's workout pants. He plans on pulling them down, but oh, he has claws now, and suddenly Katsuki's bare and there are red lines all over his pale skin.

Katsuki growls, and the sound is almost enough to make Ei stop.

He just needs a little! Something! He needs something!

Desperate he claws at his own pants, grunting and whimpering until his cock springs free, splattering cum across Katsuki's face and exposed chest.

Kirishima's eyes go heavy lidded and he bucks into his fist, the glide sloppy with his last two orgasms. He's close again, he can /taste/ it, and without his shorts he feel slick sliding down his legs.

He needs something! He needs!

Letting go of his cock, he grabs handfuls of Katsuki's hair and jerks him up until their chests slam together and Kirishima's erection is pressed tight against Katsuki's and then he's gasping into the blonde's mouth and bouncing hard for friction.

His movements are uncoordinated, but it doesn't matter. Not when Katsuki sounds like a wild animal and his hot, so hot, fingers are dug into his ass and he's helping him bounce, and oh god, oh god, oh god--

There's a slight creak in the air, one that doesn't come from the two of them. It's a high pitched whine of metal. Like a door opening.

"Hey, Bakugou, are you in here?" A tired voice calls.

Shinsou.

AGAIN.

In HIS locker room! And it /is/ his! He scented it. It belongs to him!

Kirishima growls, the sound raw and frightening. The hair on his arms and the back of his neck stands up.

He's not letting anyone see his Alpha's cock!

No more thinking!

//KILL//.

Kirishima lunges.

"FUCK!" Bakugou yells as two hundred pounds of muscle jumps from his lap.

He reacts just in time, his fingers circling around Kirishima's ankle and dragging him back as he ckaws against cement and snaps his teeth.

Kiri pulls hard against Katsuki's grip, trying to be free, trying to rip out Shinsou's fucking throat and the longer the guy stands there the longer Katsuki's inclined let Kirishima go, because Shinsou is ALSO looking at KIRISHIMA AND THAT'S NOT OKAY.

"GET THE FUCK OUTTA HERE, SHINSOU!"

Kirishima starts kicking at Katsuki's hand, bucking to be free, his scent spicy in the nostrils.

It's odd, it burns in a way Kirishima's sweet scent never does.

Katsuki watches horrified and mystified as the slick on his Omega's thighs starts to effect his grip.

Fuck!

Fuck!

What is he supposed to do?!?! How is he supposed to hold Kirishima?!

His Alpha is no fucking help.

He's just shouting at how Katsuki should let Kirishima go. He should watch his Omega demonstrate strength, let him tear Shinsou apart, and then fuck him ontop of his FRIENDS CORPSE.

Which is NOT FUCKING HAPPENING.

Not knowing what else to do, but listening to instinct, Katsuki pulls hard on Kirishima's leg as he leans up.

With a deep inhale and perfect aim, Katsuki slides a finger deep inside Kirishima's wet hole.

His Omega /keens/.

Immeadiately he sags against the floor, the fight gone, and Katsuki breathes a sigh of relief.