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“On your left, Deku!”
He skids, swinging his head to the side. With Todoroki already grappling with their two marks, the reverberating bang behind them currently has no explanation. His fingers press into his headset as he darts into the alleyway. “Got it, Kacchan. Approaching source of gunfire.”
There is, indeed, a person behind the bullet. Dressed in a nondescript gray hoodie and track pants, she could easily blend into a crowd. The Glock in her left hand, not so much.
So there was an unknown third man? How did that happen?
He doesn’t have a lot of time to process this new intel, nor to communicate it, because she flings her arms out.
He slams his feet into the ground, metal soles creaking around his sneakers. Shit. Who knows what her quirk is or—
Izuku coughs hard, eyes scrunching shut. He sneezes into his elbow, grimacing. Some sort of airborne quirk? Did she just throw powder at him or something?
He shakes his head, looking back up to find her still in front of him. “You’re under arrest for unlawful use of a quirk with intent to harm,” he says, taking a step forward. The ground wobbles under his foot. “While it is not legally mandated, I would appreciate it if you tell me your quirk registration data while I take you into cust—”
He stumbles, vision swimming. The world feels off-center, canting to the side as his limbs buzz with a tangled energy.
“Deku! She’s getting away, what the fuck are you doing?”
Kacchan’s voice shocks his body back into action, even if he’s still disoriented.
“Chase her, dumbass!”
His limbs need no further command. As his eyes readjust, he finds her several paces ahead of him, sprinting toward a fire escape.
He feels his mouth flood with saliva, panting as he unhinges his jaw, teeth aching.
It’s not the first time someone running from him has activated his prey drive, but it’s so intense that he can’t help but feel like something is wrong.
She reeks of fear. It makes his head pound as he catches up, snagging her by the back of her hoodie and dragging her to the ground as she squeals. The gun flies from her hand, skidding into the building’s side.
It’s almost disappointing, how quick a chase it was.
He crawls onto her, drooling. Glee pumps sluggishly through his blood at his victory. Caught her. He caught her. And so easily, too!
Ah, her throat is so thin. He could tear through it in a single—
Izuku stiffens, eyes wide.
The woman stares back, heaving.
“What did you do to me?” he asks blankly. The back of his skull crowds with a rumbling snarl, the rest terrifyingly vacant. He swallows thickly, mouth coated in spit.
Venom dots her shirt, dripping down Izuku’s chin.
“You got her?” he hears Kacchan ask, behind him.
“Y-yeah,” he answers, blinking. “Um…”
“Rest of ‘em are locked up and getting wrangled by Half-n-Half. The hell are you waiting for? Let’s bring her over.”
“Kacchan,” he says shakily. “I think, um. I-I think that she…did…something to me?”
He hears Kacchan’s boots crunching against the ground as he approaches. “You quirked?”
“I think so?”
“Side effects?”
“Blurry vision for a moment. Some disorientation. My senses are heightened. Um. Skin feels flushed and sensitive. Increased saliva. Prey drive is very active.”
Kacchan’s shadow falls over him. The animal under Izuku is breathing hard and shallow, staring up at him with large eyes. Her jugular pulses, covered by the thin barrier of her skin. “Care to explain that last one, Deku?”
“…I’m thinking about eating her,” he admits.
Kacchan doesn’t say anything. Then, “Yeah, I need you here. I don’t give a shit about them. Dump ‘em on the cops; that’s what they’re there for. Deku’s been compromised. I need to watch him. Unknown third man’s been caught.”
Fingers slot around Izuku’s nape. He slumps slightly, but his hold on the woman under him is tight. He isn’t going to let his catch go. “I got her, Kacchan,” he says. “I got her. Did you see?”
“Yeah, I saw.” Kacchan’s fingers squeeze lightly.
Izuku arches into the grip, eyes lidding. He licks his fangs, tongue tingling with venom.
The woman stares at him, swallowing thickly.
Oh, he is hungry. He wants to bite. He would very much like to bite. But no— No, he knows not to bite. His mom taught him not to bite. All Might taught him not to bite. Kacchan taught him not to bite. The animal in him always wants to bite, but he’s learned not to let it. That’s why he has the muzzle on his uniform. To stop the biting.
Adrenaline? Maybe that’s why his head is so weird, right now? Adrenaline in a fight makes him want to bite, usually. He should probably apply his muzzle, but he can’t will himself to let go of his catch even a little bit. She’s still breathing under him, after all, which means she might get away.
He can’t let her get away.
“Bakugou. Midoriya.”
“Half-n-Half. Why are you just standing there? Get your ass over here.”
Izuku looks up.
Todoroki is grimacing several paces away, covering his nose. “He smells terrible.”
“The hell are you talking about?”
“Midoriya. He smells like actual wet garbage, Bakugou.”
“Oi! Fuck off. He smells fine, fuckface.”
“If you like wet garbage. Sure.”
Izuku hears Kacchan sniff. The fingers around his neck twitch. Then, “Shit. Grab her and call medical.”
“Yeah, that’s the plan. —Midoriya, let her go. I’ll take her.”
He snarls, curling over her. “It’s my catch!”
Todoroki’s hands flex at his sides. “Stand back, Bakugou. He’s going feral. I’ll have to remove her.” He locks eyes with Izuku before slowly taking a step forward.
Izuku lunges at him, teeth first.
“Shit!” Kacchan slams him back to the ground.
They roll until he’s on top, a forearm bracing Izuku’s chest against the ground. He forces his palm under Izuku’s jaw and shoves his uniform’s muzzle up, pressing it hard against his face as Izuku jerks his head.
Kacchan’s body is heavy as he leans over him, fingers scrabbling at the back of his skull to secure the muzzle tightly. “Fucking— Calm down, shit.” Izuku bucks, hard cock rubbing between their bodies. The feel shocks him for a moment, muscles tensing as he presses up into Kacchan.
The muzzle clicks.
“Half-n-Half, get her the fuck outta here. He’s in rut!”
Izuku growls, grimacing at the way the muzzle forces his jaw shut under the unrelenting metal. He needs to— Needs to—
Oh shit, he is in rut. Fuck.
“K’chan,” he manages, frantic. His hips don’t stop grinding against the back of Kacchan’s thighs, which is very embarrassing. “Y’g’ta g’t ‘way!”
“No, dumbass, I gotta keep you pinned,” Kacchan hisses back. “I let you go now and you’ll just come after us!”
He has a point. Damn it.
Kacchan reaches around Izuku’s side, fumbling around in one of his satchels. Probably looking for an emergency inhibitor. Wait— That could be a problem.
“L’me t’lk pl’se, K’chan, w’g’tta f’gure—”
Kacchan curses, clicking his muzzle back one latch. “Say your piece before I lock you back up, Izuku. I ain’t giving you a centimeter of slack once you go feral.”
“Exactly!” he says. “I’m gonna go feral, Kacchan. I’ve read about quirks that can induce artificial ruts and their effects are significantly varied! Regardless, with someone like me who already has to wrestle with his alpha outside of ruts, I mean, I have to wear a muzzle pretty regularly, as you know—”
“Get the point!”
“I’m on the heaviest suppressants on the market! I don’t know how they’ll interact. You can’t inject me with an inhibitor until we know the exact nature of her quirk!”
Kacchan stares down at him. “Are you fucking serious?”
“Wh— Of course I am! Kacchan, we’ve talked about how my alpha is—” His body lurches up, teeth snapping in the scant space they’re allowed. “Shit!”
Kacchan shoves him back into the ground, brow furrowed. “So the quirk overrides suppressants?”
“Apparently? B-but that doesn’t mean that there won’t be chemical interactions with the… The, u-um…” Kacchan smells really good. “D-did you see how fast I caught her?”
Kacchan rolls his eyes.
“Sh-she smelled like a weak one. I— I want to eat her. Or you can. I’ll give her to you, Kacchan. I want you to be well-fed, I—”
“So if I stick you with an inhibitor, you might get fucked up. That your point?”
“Dunno,” he replies. “Kacchan, can I bite you?”
Kacchan scowls. “No, you fucking loser.”
“Y-you let me bite you last night.” He pants at the memory, rubbing himself against Kacchan. Even through thick layers of clothing, it feels good. Right.
“After we fucked. You know the muzzle stays on when you go full knothead. You got no fuckin’ control.”
“I— I’m in control.” He blinks. “Well. A little. More than…y’know. ‘M losing it, though. Can I please bite you, Kacchan?”
Kacchan leans down, clicking the muzzle back to the maximum tightness.
Izuku whimpers.
“Half-n-Half’ll get us a car,” Kacchan says. “Until then, I’m not letting you move, Izuku. Got it?” He sits back, ass resting heavily over Izuku’s cock.
Izuku yelps, head falling against the ground as his hands curl against his chest, hips grinding frantically against the pressure.
“We’re lucky she got you,” he faintly hears Kacchan say, voice muffled by the blood pounding against the wall of Izuku’s skull. “You’re right; your alpha is fuckin’ psycho. You’re the most bite-obsessed motherfucker I’ve ever heard of. But you got some strong-ass control from dealing with that your whole life. Any other alpha fucker would have ripped her throat out without a thought.”
Is that a compliment? Is Kacchan complimenting him? He isn’t sure. Words are hard. Still, a ragged purr rumbles from him as he continues to hump uselessly against Kacchan’s unmoving weight.
“Shit, you’re getting deep, huh? That’s fucked up, having a quirk that can bypass suppressants like that.”
“K’chan,” he contributes.
Kacchan sighs, subtly grinding back against him.
His heart surges at that, a happy trill escaping as he sits up, nudging his head against Kacchan’s chest. “K-K’chan!”
“Yeah, yeah,” Kacchan says, petting his hair back from his face. “You’re gonna be a useless little leg-humping loser until you cum, aren’t you?”
He offers Kacchan an adoring look, pressing his head into his palm.
“Whatever. Jizz before Half-n-Half gets here so that I get you to medical, Izuku.”
Izuku hums, eyes lidding as Kacchan continues to rut back against him. The muzzle is clogged full of drool and venom, wetting his face and soaking him in his own rut stench. It’s enough to almost drown out the perfect scent of Kacchan. Almost.
His cheek slides along Kacchan’s chest, nuzzling into the warmest, smelliest bit.
“Wh— Are you fuckin’ serious?”
He presses his face hard against Kacchan’s armpit, snuffling. So warm, pungent with Kacchan. Perfect. A groan pushes through his throat as he wraps his arms around Kacchan, hips jackrabbiting against his ass.
Kacchan’s gloved hand presses hard on his skull, fingers twisting into his hair. “Come on, finish up, dumbass. Half-n-Half’s be back soon and I don’t think you want medics to see you trying to fuck a hole in my uniform.”
He pants, drool dripping from the slots in his muzzle. Oh, he would really love that, actually. His cock sinking into Kacchan’s warmth, where he’s softest.
Izuku whines, pawing uselessly at the back of Kacchan’s shirt.
“Izuku, fucking hurry up.”
He is! He is! He wants to give Kacchan everything always. All the time. He wants to cum, he wants to be good, he wants to stuff Kacchan full and—
Kacchan rips off his scent blockers.
Izuku chokes, eyes rolling. It’s just— Kacchan is so—! Just so, so good on a normal day, makes his jaw ache, makes him want to…um… In rut, it’s so much more intense, that thrumming in his blood, the swollen ache between his thighs reaching a fever pitch.
Kacchan smells like musk and sweat and the tang of his quirk and…and like…
Fertile. Kacchan just smells so fertile.
He squeezes Kacchan hard, forcing him down to meet his desperate, clumsy humping. “K’chan,” he keens, cumming hard as he grinds his teeth together, trembling.
Kacchan curls an arm around his head, pressing him into his chest. Warm. Warm and smells like Kacchan and oh, he wishes he was pumping everything into Kacchan, right now. He wishes he were getting Kacchan pregnant. He wants to get Kacchan pregnant. He wants…
The muzzle clicks, falling from his face. He gasps, tongue lolling as he feels his jaw pop. Ah. Ah, that hurts. His cock is spurting its last dredges for this round and his teeth are aching and he can bite now. He needs to bite. Has to bite. Bite. Bite.
“Sh,” Kacchan murmurs, massaging the hinge of his jaw with a firm thumb.
Izuku moans, lashes fluttering. Feels good. He wants to bite so bad. Aches almost as much as his knot, worthless and burning at the base of his cock without proper stimulation.
“You got a massive cum stain on the front of your hero suit, dipshit.”
Does that matter? He doesn’t want clothes; he wants Kacchan. Kacchan, around him. Kacchan’s wet, warm…
“I wanna make babies with Kacchan,” he slurs, offering a dopey smile. “Wanna…wanna give Kacchan everything. Wanna give him…”
“I’m putting the muzzle back on,” Kacchan says.
“Mm. Can I bite first? Kacchan, please? Kacchan, wanna bite, wanna bite so bad, hurts, wanna…”
Kacchan sighs, shifting back slightly.
“Kacchan? Kacchan?”
“Shut up. I’m getting you something. Chill.” Kacchan grimaces. A tearing sound stops as soon as it starts.
Izuku perks up when Kacchan sits taller, pressing harder on his still-hard cock. Sex. He smells sex? Sex. Sex now?
Kacchan is holding in his hand— Sex? Slick? Sex?
Underwear. Ah. Kacchan’s soaked underwear. That was touching Kacchan where Izuku wants to touch Kacchan. With his fingers and his mouth and his cock.
He follows the scent, head tilting with Kacchan’s hand, eyes trained on the ripped panties. It’s heady, musky and Kacchan. He wants it. He wants it so bad.
Kacchan stuffs his underwear into Izuku’s mouth and shoves the muzzle back up, clicking it shut.
Izuku chirps, eyes rolling at the taste. His teeth saw into the cotton, chewing languidly as Kacchan drags him to his feet, bracing his lax body against him.
Oh. Oh, this is nice. Nice and wet and musky and heavy with Kacchan. His tongue laves at the fabric, slick flooding his muzzle and encompassing him in Kacchan. Kacchan. Oh, Kacchan…
“Did you just get him drunk on omega slick?” he hears distantly. The person speaking is familiar, but he is not Kacchan, so he does not matter.
“Fuck off, Half-n-Half. You got a discreet car for this loser and me?”
“I do. But you have to promise not to fuck in it, Bakugou.”
“I ain’t promising shit.”
Izuku stumbles against Kacchan’s side, blinking slowly as Kacchan tugs him by his muzzle, angling his head down to shove him into a small space. He dutifully crawls inside, gnawing and sucking on Kacchan’s soaked panties.
“I’m serious, Bakugou. I promised Iida I wouldn’t let you two have sex on agency time again.”
“He can shove it. I think this is an ‘extenuating circumstance’ or whatever the fuck he said last time.”
“…Fair. I’ll tell him as much. Please don’t rock the car. I want to get you both to medical without incident.”
Something slams. Then a hand roughly shoves Izuku onto his side, rolling him onto his back. Kacchan is over him, caging him in. Izuku suckles at his slick supply, gurgling as Kacchan unzips him, allowing his cock to slap wetly against his stomach.
“K’chan?” he chirps, head lolling.
“You did a good job, earlier,” Kacchan says, which has him purring loudly in response. “Like I said. My little biter does have some restraint. Way more than those loser alphas who don’t have to fight this shit every day like you do.”
“Bakugou, I find your distaste for other alphas offensive.”
“Half-n-Half, you will close that divider right now or you are gonna hear the grossest rut-induced fucking of a lifetime. Got it?”
The divider between the driver and passenger sides slams shut.
Kacchan leans over, breath fanning across Izuku’s forehead. He clicks the muzzle free, tugging it down. Izuku chews on the panties bunched in his mouth excitedly, hips wriggling. “A good job,” Kacchan repeats, reaching down to grab Izuku’s cock by its swollen base. “Not perfect, but good. So let’s get you a little reward before medical gives you the lab rat treatment.” Kacchan tugs his underwear free of Izuku’s teeth. “How’s that sound?”
Izuku offers a sharp smile in response.