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“What the hell happened to you? You look like you got mauled.”
Bakugo typically doesn’t pay attention to the stupid conversations his classmates have before Aizawa comes in but Mina’s voice, and the panic in it, forces him to look over. Kaminari’s sheepishly sliding into his seat, hitching his collar higher like it’s going to do fuck all to hide the massive amount of hickies and teeth marks that litter his neck. It’s enough to make him curl his lips, the Alpha in him rearing its head at the sight of an injured Omega.
Instinctive bullshit but Pikachu’s part of his pack. Bakugo doesn’t like others ruining his things.
“Oh, uh, no, it’s all good.” Kaminari’s unusually embarrassed, sinking down with red cheeks as he fiddles with his books. “Just...uh...remember Shinsou? From the group training?”
“Mind control guy, right?” Sero rubs his chin. “You guys were teamed up. Looked like you were flirting pretty hard.”
“Yeah, uh...so we hung out last night and, uh,” Kaminari’s voice drops to a whisper and if Bakugo wasn’t listening so closely he would’ve missed it, “we maybe...play mated?”
Mina squeals as she lunges for Kaminari, Sero and Kirishima moving out of her way.
“No way! Tell me everything. I want all the details! I’ve never done it before!”
As Kaminari tries to fight her off, suspiciously quiet about this lewd bullshit as opposed to everything else he openly talks about, Bakugo drums his fingers on the desk. Play mating. It explains it, that’s for sure. Alpha’s get mouthy any time mating is even suggested, he’s ruined more than a few pillows during ruts, even having to sleep with a mouthguard so he doesn’t sink his teeth into something that could damage them.
Guess Shinsou lived up to that stereotype too.
Still. It’s not like play mating is a foreign concept to him, it’s part of every sex-ed class and Midnight had revisited it on their mandatory refresher course once the dorm system was set in place. Alphas and Omegas, even Betas though it’s not as common for them, rolling around and playing at the idea of mating. It’s like dry humping but with pheromones involved--at least that’s how his old man had tried to explain it.
Part of a normal development. A way to parse how the body reacts during mating without settling down with someone at a young age. Finding out any issues that might arise and giving someone a chance to take care of them while habits are still easily formed.
Bakugo’s never done it.
He doesn’t have time for it. He’s shooting to surpass All Might, he doesn’t have time to roll around with someone and waste hours he could spend training. Besides, no one’s ever caught his interest enough that he could envision it.
Well...no one before this year. And Bakugo isn’t quite ready to actually admit to his little bullshit crush anytime soon.
Still, a part of him wonders as he watches Mina harass Kaminari, eyes drifting past them to the rest of the class. He doesn’t think half the people in this fucking class have even considered it but…
Deku. Fucking Deku. He’s settled at his desk, grinning at something IcyHot is saying. His other ragtag party members are crowded around too, all up in each other’s space. It’s a mix of Omega, Beta, and Alpha. They’re all so...comfortable with each other.
Bakugo watches Todoroki murmur something to Iida, the other Alpha leaning in just a bit before answering with broad movements of his arms. Uraraka is half-sitting on Deku’s desk, ass close enough to his arm he could grab her if he wanted. Frog Girl’s hovering too close for just friends too.
Fuck. Have they all play mated with each other? There’s a level of confidence in the way they move around one another…
In a lot of people, now that he’s actually looking for it. In the way Tokoyami settles on Shouji’s desk. In the way Jirou leans over Momo to look at something on the girl’s phone. In the way Hagakure plays with Ojirou’s tail, the fluff of it moving as he grins over his shoulder.
Anger sparks in his chest immediately. Red-hot.
Is he the only fucking Alpha who’s never done it? Is everyone just secretly laughing at him because they’re all fucking off whenever they get the chance and he’s training?
“Bakugo, don’t blow anything up.” Aizawa’s voice cuts through his rage, his fingers curling into his palms to stop the explosions that were boiling up without his noticing. “Everyone in your seat. Let’s get started.”
He can’t shake the thoughts, though. The anger settles into a slow burn in the back of his mind but he can’t get rid of it. It follows him throughout the day, through lunch and training--though he uses a good portion of it to fuel his AP shots until he feels the ache all the way up his forearms.
It’s ridiculous. Like a dog that won’t stop following him around. Irritating enough that he finally gives in when he’s in his room after dinner, pounding on the wall that he shares with Kirishima.
It takes a few moments but then there’s a knock on the door and a wild mess of red hair poking through.
“You need something?”
“Get in here.”
“Uh, okay.” Kirishima closes the door behind himself but doesn’t come further into the room. “Everything ok?”
Bakugo leans back onto his palms on the bed, staring at him for a long moment. Sizing him up. He looks...stupid good in loose pants and a plain shirt, clearly prepping for bed. His eyes are big and wide, clearly content to wait until Bakugo talks first.
“You ever...play mated before?”
“Oh.” Instantly his cheeks go as red as his hair, Kirishima’s hand going to the back of his neck. “Uh...jeez, that’s kinda out of the blue, man.”
“Just answer the damn question.”
“Well...no. It’s kinda...embarrassing, isn’t it? I dunno...seems like it.” He looks down at his feet then back up within seconds. “Wait, is this about Kaminari? Are you pissed about it? Because we’re pack and all but you can’t keep him from play mating with Shinsou if he wants to--”
“Shut up. It’s not like that.”
“Oh.” Kirishima takes a few cautious steps forward, then a few more until he’s lowering himself onto the bed next to him. “Then...why’d you ask?”
“Damn Deku.”
“Uh….you wanna explain?”
“That damn Deku.” The anger is back and Bakugo pushes himself off the bed, pacing in front of Kirishima’s confused gaze. “He’s so fucking close with those losers he’s friends with. Glasses and IcyHot. They’re probably play mating all the fucking time and laughing at anyone who’s not.”
“Uh...well I don’t think they’re laughing at people--”
Bakugo rounds on him instantly, Kirishima gulping and edging backwards onto the bed with a nervous grin.
“What the fuck do you know?”
“I don’t, I swear!” He waves his hands before clapping them together in prayer. “I’m not hiding secrets, I just...didn’t think you’d care?”
Bakugo gets a fistful of his shirt--ignoring the delicious scent that wafts up from the move and the way it makes his teeth ache.
“Tell. Me. Everything.”
“It’s not much, man! I swear! I just...I went to borrow some weights from Midoriya once and Iida opened the door kinda sweaty and stuff. And, y’know, there’s like a…scent to that kinda thing. And I’ve smelled that same scent on Uraraka and Todoroki too so I just...made assumptions?”
He hums, looking up at the ceiling for a moment, a chagrined look crossing his face.
“Though I guess it isn’t very manly of me to assume. But I also didn’t think it’d be very manly to pry into their business, y’know?”
Bakugo lets go of his shirt and rocks back on his heels, feeling a little like he just got hit with a brick. Deku’s play mated. More than once. With more than one person.
And he’s never done it.
That fucking nerd is probably laughing at him with his stupid friends. Cracking jokes about how he’s weak because he didn’t wanna waste time grinding when he could be doing something useful.
“Take your clothes off.”
“What?!” Kirishima yelps, hands planting themselves onto his face as Bakugo reaches for the hem of his shirt. “Hey, whoa, wait a second! What’s going on?!”
“We’re play mating. Take your fucking clothes off.”
“Uh...that’s--”
Bakugo pauses with his thumbs hooked in the waistband of his pants. Kirishima is staring at the ceiling again, flush going down his throat and staining the skin there as red as his hair. His scent isn’t scared, just startled, and there’s a sweetness to it that’s making Bakugo want to get it on his tongue.
But he’s not looking at him or moving to take any of his clothes off.
“Do you...not want to?”
Damn. This is awkward and...kinda hurts. He’s not the nicest and he’s never tried to show how he feels towards the redhead but...he thought it was clear he at least liked him. Thought Kirishima liked him back.
“No, I...I do.” Still not meeting his eyes and getting redder by the second. “I...like you. It’s just...sudden? I didn’t think you wanted to do this kinda stuff.”
Bakugo narrows his eyes, something ugly and feral snarling in his mind.
“Have you done it with other people?”
“No!”
“Then why is it a big deal? We’ll do it, see what the big fucking fuss is, and then…”
And then what? Kirishima seems to be wondering the same thing, finally looking at him with eyes that seem as big as the moon. Bakugo straightens, feels himself flush, and crosses his arms over his chest.
“Then what? Kirishima asks quietly.
“Hell if I fucking know. We do whatever you want. You’re the Omega--aren’t you supposed to set the rules for this kinda shit?”
Like he didn’t know. Like every Alpha with parents that were worth anything didn’t have that shit drilled into their head from the time they presented. If he had to listen to one more lecture from his old hag about respecting Omegas and never pushing them into anything…
“Yeah but...I dunno. Wouldn’t you wanna do it with someone who’s already done it?”
“And risk making a fucking idiot of myself?” Bakugo snorts. “No thanks. Last thing I need is some loser comparing notes.”
Kirishima’s contemplative as he sits on the edge of the mattress, hands dangling in between his knees. It’s tempting to sit next to him--it’s his damn bed--but Bakugo hooks a hand around his desk chair and yanks it over until he can sink into it. There’s not much space between them but in a room like this Bakugo would have to go lock himself in the bathroom if Kirishima wanted anything more.
Not a bad idea. The acoustics are great. He could just scream himself into oblivion.
“I don’t--look, bro, I’m not saying I don’t wanna. Because I do! It sounds...super fun but…”
“But what?”
“Well, it’s just--” Kiri’s hand goes to the back of his neck again. “When I was interning and stuff, Fat talked a little about it. I guess that Amajiki and Mirio do it pretty often? And he said you shouldn’t do it with people you don’t like, how it can leave a bad impression. You don’t have to mate whoever you play with but...you should have some feelings for them.”
Oh.
Well.
Bathroom. Screaming. Maybe blowing some shit up. It’s not too late, Aizawa probably won’t rip his ass too much when he has to call Cementoss to fix it.
“I get it.” His voice is rough and it feels like there’s a ball in his throat as he pushes to his feet. “Sorry or whatever. Didn’t mean to make you uncomfortable.”
“Huh?” Kiri’s hand shoots out, grabs ahold of his wrist. “Wait! What are you--I wasn’t saying no!”
“You don’t have feelings for me and I fucking get it, okay? So you don’t wanna do it. Whatever. It’s no big deal. It’s stupid anyways.”
“Uh...no.”
“Yes?”
“No,” Kirishima shakes his head, strands falling from the wear and tear of the day to flop onto his face. “No, you don’t have feelings for me! That’s why I was saying it! I don’t want your first time to be with someone you don’t like.”
What.
“I do have feelings for you, you red haired loser!” Bakugo palms Kirishima’s face and shoves until he topples backwards. “Why the fuck would I offer to do this shit with you if I didn’t?!”
Kirishima doesn’t have a response to that, peering up at him with eyes the size of dinner plates. It takes Bakugo a moment to realize his scent is changing, going sweet again, something hot sneaking in--like sugar fresh off the burner. He looks down and realizes the position he’s put them in, Kirishima splayed out on his back with Bakugo leaning over between his legs.
Fuck. Stupid fucking--
“Hey, so…” Kirishima raises his arms, like he’s going in for another one of his stupid persistent hugs he tries to drag Bakugo into all the time. “If you like me and I definitely like you...you wanna...maybe...play mate?”
Bakugo knows his grin must be a little bloodthirsty, just a touch too sharp, but can’t wipe it off as he leans down with a snort.
“Fucking moron.”
Kirishima tastes like the curry from dinner and the chocolate protein powder stuff he chugs. It should be nasty, tasting these things on someone else’s tongue, but Bakugo snarls into his mouth and presses deeper inside. He’s on the bed now, kneeling with Kirishima’s thighs pressing against his, gripping handfuls of the other boy’s shirt.
“How do we--”
“Just do what feels good.” Bakugo echoes a little breathlessly in between kisses, remembering every stupid lesson they’ve had about it. “Whatever feels right.”
It takes a long few minutes--not that Bakugo minds as he maps out Kirishima’s teeth with his tongue and realizes they’re not as sharp as they look--but the legs at his sides raise hesitantly until they’re hooked at the ankle behind him. The position tears a feral sound from his throat and Bakugo yanks at Kirishima’s shirt until he can toss it off the side of the bed, hands greedily pawing at the newly bared skin.
“So fucking hot. How the fuck could you--” Bakugo dips his head and tests the edge of his teeth against one cute nipple before soothing it with his tongue. “How could you think I didn’t want you?”
“Not good. Not--you’re so good and I’m just--”
“You’re fucking amazing. Talk shit about yourself again and I’m gonna bite the fuck out of you.”
Kirishima’s pupils are huge as he lets out a whine--a real Omega whine that makes Bakugo’s cock jerk so hard it nearly hurts--nails scraping up his shoulders until fingers fist in his hair.
“Please.”
“You want that?” Bakugo noses up, over his collarbone and the divots there, until he can feel the pound of Kirishima’s pulse under the swipe of his tongue. “Want me to bite you, Omega? Sink my teeth in and let everyone know what you’ve been doing?”
His answer is a rough tug on his hair, almost painful. Bakugo grins around the flesh before carefully sinking his teeth in, increasing the pressure until Kiri lets out a sharp whine and bucks up into him. The motion moves them and Bakugo snakes a hand under, flattening his palm on his lower back and using it to keep the position.
God, Kiri’s ass feels as amazing as he thought it would, especially tucked up into his lap like this. Bakugo lets himself roll forwards into it, grinding his cock against the plush curve and readjusting his teeth to bite once more.
“Oh god, oh jeez,” too fucking cute, all breathless and whiny for him, “Bakugo, you gotta--my pants. I want to--”
“Yeah.” It’s rough to get the word out, rougher still to peel himself away, but necessary.
He’s surprised either of them get their clothes off at all, stopping every second to kiss or touch or grab. But eventually it works and Bakugo gets yanked back onto the bed with fingers that bite into his arm just rough enough. He might have bruises in the morning, especially if Kiri hardens at any point.
Good. He wants them. Wants everyone to look at him and Kirishima and know exactly what the fuck they got up to tonight.
Kirishima lets out a whimper when he comes down atop him again, no more barriers between them, both writhing to get all the contact possible. His legs spread easier this time, more confident, and Bakugo can’t help the growl that bubbles up when his cock brushes sweat slick skin instead of sweatpants.
“Fuck. Fucking--fuck. You feel so--”
“M’wet.” Kirishima mumbles and Bakugo nearly goes cross-eyed with the heat that shoots up his spine. “You can--you can feel it. Man, I’m so fucking wet for you.”
He thinks about asking for permission for a split second. Just to make sure. But Kirishima beats him to the punch, raising one leg higher to sling it over his shoulder and reach down between them himself. There’s a punched out sound and Bakugo isn’t sure who made it as he dips his head to watch Kirishima slide a finger inside himself.
God, he can see it. The sheen on the curve of his ass, on his fingers as he slides them in and out.
All Bakugo wants to do is watch. Sit and watch Kiri touch himself for hours, days even. He could die right now and he’d probably be fine with it because this is the closest to heaven he’s ever gonna get.
Well, maybe not. Heaven on Earth would be fucking Kiri after he got crowned Number One on the charts.
But he can’t. Not when Kiri’s face crumples in a frown and he whines again, something needy in it that makes it feel like someone carved out a piece of his chest.
“Not enough. S’not...not enough. Bakugo--fuck--Katsuki, please.”
“What do you need?” The words come out in a rush, slurred, each syllable melting into the next because his tongue feels too big for his mouth. “Tell me. What do I--what do you want me to do to you?”
“Inside.” Kirishima reaches up slightly and yanks a gravel rough sound from him as he wraps his fingers around Bakugo’s cock. “Want this inside. Wanna know what it feels like.”
He swears something filthy, mindless, hooking Kirishima’s legs into the bend of his elbows and shuffling forwards. The position forces Kirishima into a curve, stomach arched up as his ass presses down, trying to get even closer.
Prettiest picture he’s ever seen.
“Put me inside.” Bakugo manages, hips hitching forwards as Kiri’s hand spasms on his cock. “You gotta--fuck. Get me inside you.”
It’s fumbling. Messy. The second his cockhead touches wetness Bakugo can’t help but hump forwards, cock sliding in the mess and missing its goal entirely. Both of them let out groans of disappointment but Kirishima isn’t giving up, gripping just a touch harder and trying again.
It works this time. And Bakugo feels every bit of air leave his chest in a wheeze as he rolls his hips and sinks his cock into wetness so tight it feels like he might die.
“Katsuki.” Kirishima’s got his hands fisted in his own hair, yanking it like the pleasure’s tearing him apart. “More. Moremoremore. Fuck, you feel so good.”
He can’t think for a long while. All Bakugo knows is how good Kirishima feels under him, around him. His hips move without him thinking about it, thrusting in as hands grab for his shoulders, hair, anything they can reach. Kirishima bites down when he leans in for a kiss and the taste of blood only makes him more feral.
“Fuck. Fuck, fuck. Kiri, you’re gonna--” It’s so fucking embarassing that he’s gonna knot so fast. Feels like they’ve barely started.
“Yeah, yeah. Wanna feel it. Knot me.”
No hesitation. So fucking perfect for him.
Technically they shouldn’t. Knotting isn’t something that usually happens during play mating, just to ensure that no heats or ruts get triggered. But Kiri’s asking for it, practically begging for it, arching until it looks like he’s gonna break his back just to get closer.
God, how good would he look presenting? On his hands and knees with Bakugo covering him, protecting him as he fucked him into the mattress and knotted him until he was coming all over himself.
That thought does him in. The thought of more past this, of taking their time after this first go, learning what the other likes. Of Kirishima initiating one day, pushing aside their work while they’re studying and straddling him, begging for his knot.
“Eijirou.” The name slips free as Bakugo thrusts deep and stays there, choking on the syllables as his knot catches and swells inside the grip of his best friend’s body.
He’s never gonna be able to go back to his hand again. Not after this. Not after he hears Kirishima’s inhale come back out on a moan, not after his hands drag Bakugo into a kiss as he shudders and shakes his way through an orgasm that almost looks like it hurts. His jaw aches with the need to bite down but he forces the urge back.
For another time. Because there will absolutely be another time.
It takes a while for both of them to come back to Earth, their panting breaths filling the space, the scent so thick he’s going to have to keep his windows open for a few days to get it out.
Or maybe he won’t. Maybe he’ll trap it here so he can always remember this.
“That was...whew.” Kirishima finally mutters into the crown of his head, Bakugo grunting an agreement from where he’s laying on his best. “Kinda see why people do it every chance they get.”
“Feel good?”
“Felt amazing.” The Alpha in his brain purrs at the praise as Kiri strokes a hand down his back. “God, just jacking off isn’t gonna cut it anymore.”
“Good.” Bakugo nips at the peak of one nipple, grinning at the affronted whine it earns him. “Don’t do that shit. Come to me if you wanna get off.”
There’s a long moment of silence, long enough that Bakugo pushes himself up onto his hands once more, shivering at the tug of their bodies, his knot still thick inside. Kirishima’s not looking at him, eyes on the ceiling, though his fingers are trailing heat up and down his sides.
“What.”
“So this wasn’t--you wanna do this again?”
“If you let anyone else touch you, I’ll blow both of you sky high.” Bakugo snarls, Kirishima’s lips curling up into a smile before it breaks apart in laughter.
“Possessive! Guess I shouldn’t be surprised. Big bad Alpha like you.”
“Your big bad Alpha.” Bakugo grumbles, leaning down to nose at his throat, hiding his face for the next words that slip free. “If you want me. Or whatever.”
“Of course.”
Simple and easy as breathing. No underlying machinations. Just honesty as Kirishima wraps his arms around his shoulders and keeps him in close.
“Always want you, Kats. Always did. Even when I didn’t think you wanted me back.”
It feels good. Feels right. Feels like maybe once all this is said and done...they won’t ever need to play mate with anyone else. Won’t need to mate with anyone else. Bakugo can’t picture it ever being as good as it is with Kirishima right in this moment.
Maybe this is what they mean when they say some Alphas and Omegas are meant for each other. That they know it in their bones from moment one. It’s too perfect to be anything else.
Bakugo’s always known he’ll be number one. Number one in UA, number one in the Billboard rankings. Might as well add number one mate to that too. He’s gonna make Kirishima so fucking happy he won’t ever even look at anyone else.
Good thing he’s got his whole life ahead of him to do it.