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Deku crawls on the floor towards him, eyes bright and shining. Fuck—Katsuki can’t endure that look for another second and he stands up, his boots thudding heavily on the wooden floor as he crosses the room.
“Who the fuck said that you could move?” Katsuki’s voice echoes in their bedroom. While he’s appreciative of the fact that they sound proofed their house, he’s still mad that it was the nerd’s idea first.
Katsuki doesn’t even give him time to react to the question, driving the air out of Deku with a steel toed kick to his stomach. He smiles at the way Deku's face twists from the pain, somewhere between agony and pleasure.
He’s gorgeous as he curls into a ball, protecting his stomach from another kick. Katsuki doesn’t mind him in that position, it lets him to do what he wants without Deku being able to anticipate it. With a wild grin he brings down his booted foot onto Deku’s head. Slowly, he grinds the tread into Deku’s cheek. Leaning forward, Katsuki brings more of his weight to bear, crushing Deku’s head into the floor.
Deku’s eyes are screwed shut, beads of tears forcing themselves out between clenched eyelids. The sight of Deku trying to hold back his waterworks makes Katsuki's dick twitch.
“What a real pathetic piece of shit. What the fuck is wrong with you?! Huh? Can’t stay the fuck outta the way of a real hero, right?” Katsuki screams at Deku, spittle flecking his partner’s face.
Deku jerks as Katsuki yells, hips twitching forward, his head still painfully pinned down.
Katsuki scoffs, “You’re a freak.” He lets the accusation fall from his lips, like sewage from a industrial pipe.
Deku's whimper at the accusation is muffled by the thick tread pressing against his mouth. Even above him, Katsuki can see how goosebumps break out over his skin. Katsuki lifts his boot away from Deku’s face and brutally smashes it into Deku’s side. The steel tip digs into his ribs and wrenches a loud cry from him as he tries to move away from Katsuki.
“You like that?! Did you get off on this when I beat you in middle school too? Nasty little bitch.” Katsuki feels his lips pull back from his teeth as he snarls.
Deku rolls onto his back, trying to rub at his hurt side. His face is scrunched up, tears now freely rolling down his face. “No… no I didn’t, I didn’t like it.” His mumbling pleas are broken by little sobs.
Katsuki snorts, “No? You didn’t? Like I would believe that.”
Balancing on one foot, Katsuki pulls back again and aims a heavy kick between Deku’s legs. This time Deku lets out a wail. Deku’s hands grab at his crotch as he writhes around on the ground.
“Yeah I bet you’re fucking leaking in your undies right now. Your little cock getting hard from me beating you? Disgusting.” Deku is either holding himself from pain or rubbing himself trying to get off, Katsuki can’t tell. Why he’s doing it doesn’t really matter in the end, and Katsuki kicks Deku’s hands away from his body.
“Hey! Did I tell you that you could touch yourself you fucking pervert?” Katsuki stomps on Deku's open hand, indenting the soft skin of his palm with his boot tread. Deku lets out a high pitched cry. “Pathetic, you can’t stop yourself can you? Did you rub one out every time I kicked your ass? Huh? Bet you couldn’t wait to keep your hands out of your pants till you got home. Did you jack off your nasty little cock in the school bathroom?”
Katsuki snorts as Deku shakes his head and kicks at him until he’s belly down. Then he pulls a pair of special made cuffs off his belt. A “housewarming gift” from Mei, the cuffs are quirk canceling and can withstand either of them and their considerable strength.
Wrenching both of his arms back, Katsuki cuffs Deku’s hands behind him. “Now you don’t have to worry your stupid slutty head about keeping your hands off your cock.”
Katsuki holds onto the cuffs for a second as he straightens up, and then he lets go. Deku falls on his face with a grunt. Katsuki kicks and shoves Deku until he's on his back, and admires how Deku's chest is pushed out by his bound wrists. His thin shirt stretches across the hard won muscle in the most appealing of ways. Aiming at one of the stiff nipples he can see through the fabric, Katsuki slams his foot into Deku’s chest.
Deku’s mouth falls open in a gasp, winded from the blow.
Leaning over Deku, Katsuki grins,“Stick out your tongue and keep your mouth fucking open. If you close it…” Katsuki trails off and lets the threat hang in the air.
Hocking up a loogie, Katsuki lets it drip out of his mouth. The saliva and gunk hangs by a shiny thread as it slowly falls towards Deku’s face. Deku’s nose wrinkles in instinctive disgust as he watches Katsuki’s spit hang over him. The gossamer strand stretches slowly, then breaks, and the spit lands on Deku's outstretched tongue and flows down into his mouth.
Deku starts to close his lips, but Katsuki stops him, holding his jaw open with his boot. “Did I fucking say you could swallow yet?”
Whimpering, Deku holds his mouth open as Katsuki stares at the pathetic picture. Deku’s eyes are wet and red, lips plump and spit slick, chest heaving, and a prominent erection is tenting his loose sweatpants. It makes Katsuki want to ruin him.
With a cruel laugh, Katsuki pulls back. “Keep your mouth open until you finish swallowing it.”
Deku chokes down the phlegm and spit, closing his lips after he shows Katsuki his empty mouth. Katsuki can see how Deku’s hips squirm as he’s forced to swallow the disgusting mouthful. He’s not going to give him relief, not yet, so Katsuki starts to walk around him.
The boots he's wearing are from his hero costume, meticulously cleaned and polished by Katsuki himself. The hero cleaning services are fine for his shirt and pants, but they don't pay enough attention to the creases and seams of the leather and rubber, so every week, Katsuki meticulously cleans and conditions his boots.
Right now they positively shine.
The thud of those pristine rubber soles echoes through their home as he stalks around Deku's prone form. Every time he passes by Deku's head he sees him minutely flinch. Katsuki grins as he stomps right next to Deku's ear, pulling a full body shudder from his partner. He circles back to Deku's side and pauses. Without ceremony, he slams a boot onto Deku's chest. Carefully, he brings up his other foot and balances on top of his chest.
Deku’s eyes are wide and surprised as he whimpers in pain when Katsuki rests all of his weight onto the wide expanse of Deku’s chest. Deku had gotten his crying under control at some point, but now streams of tears have resumed pouring down his cheeks.
Katsuki has both of his hands shoved into his pockets as he sneers down at Deku. His partner’s breath is short, the pressure keeping him from taking in a lung full of air. “Pathetic. Is this the kind of shit that gets you off?”
Struggling to breathe, with tears streaming down his temples, Deku doesn’t answer. Katsuki carefully rocks up to his toes and then back, slamming his heels down. The force of the impact squeezes out what little air Deku had left. Lips pulled into a snarl, Katsuki yells, “I asked you a fucking question!”
Snot starts dripping down Deku’s face as he openly sobs, “Yes Kacchan.”
With a grunt Katsuki jumps up, letting his considerable body weight slam back down onto Deku when he lands, “That’s not what a pathetic freak like you is allowed to call me, is it?”
Deku seems to choke on his own words as he answers, “No- No, Sir.”
When Katsuki steps off of Deku, he immediately rolls onto his side and gasps for breath. With his back to Katsuki, he can see the harsh red lines from where the cuffs dug into Deku’s wrists. His bound hands rest against his heaving back as he tries to pull enough air into his lungs.
With Deku otherwise occupied, Katsuki takes the time to adjust himself. The way Deku cries, how much of Katsuki’s violence and rage he can take- all of it makes Katsuki hard enough to put steel to shame. He can’t do anything about it right now though. So Katsuki moves around until he’s in front of Deku.
Deku’s breathing is easier now. That won’t do, Katsuki thinks to himself.
Not quite curled up, Deku’s stomach is unprotected. Winding his leg back, he slams his steel toe into Deku’s guts. Without a second’s pause, Katsuki kicks him again in the same spot. Deku's whole body heaves, and he rolls over and vomits.
After the retching stops, Katsuki can hear him gasping and choking for air. Luckily for Deku, none of the mess gets on his boots. There is a little sick smeared on his face, but Deku ducks his head down and rubs most of it off on his shirt after he rolls back into his back.
“Really? Can’t even take a gut shot or two? How fucking weak are you?” Katsuki leans over Deku’s face. Even after trying to wipe himself off, Deku’s face is covered in fluids. His usually bright green eyes are dim and bloodshot, his breathing too ragged for him to speak.
“Weak or not, it doesn’t matter really. Let’s see how well you can take a hero’s cock.” Deku’s eyes refocus on him and then flick to the crotch of his jeans. The material is obviously tented, evidence of the fact that Katsuki is getting off on beating Deku as much as Deku is getting off on being beaten.
Leaning down, Katsuki hauls Deku up by his soft, curly hair. Deku scrambles awkwardly to position himself on his knees, trying to take the stinging pressure off of his scalp.
Keeping a hand tightly wound into Deku’s hair, Katsuki uses his other hand to unbuckle his belt and unzip his pants. With a sigh of relief, he frees his cock, head shiny with precum.
“Since you’re a useless little shit, all I’m gonna ask you to do is keep your mouth open. If you do that, I won’t break your jaw. Sound fair?” Deku’s mouth drops open before Katsuki even finishes talking, ready for Katsuki to shove himself into his throat.
After a beat, Katsuki leans down till he’s in Deku’s face. “I said. Sound. Fucking. Fair?!” Katsuki screams the last word at Deku, making him flinch.
“Yes sir.” Deku answers, eyes widened in a mix of fear and arousal.
Katsuki untangles his fingers from Deku's curls to grip the back of his skull. With his other hand, he feeds Deku his cock.
Groaning, Katsuki moves his hips till he feels the back of Deku’s throat. Then he pulls back. On his next thrust, he forces the head of his cock past the tight entrance of Deku’s throat and then shoves the rest of it down.
“Fuck, I’m sure your ass is fucking loose, a slut like you. But... shit... at least this is still tight, right?” Katsuki moans.
Deku whimpers in response, the vibrations heavenly on Katsuki’s cock. Deku’s skull gripped tight between his hands, Katsuki snaps his hips forwards again. He sets a fast rhythm as he fucks Deku’s throat like a fleshlight.
The wet sound of him plunging down Deku’s throat and the slap of his balls against Deku’s face only drives him to the edge faster. When his thrusts reach a feverish pace, Katsuki shoves his cock as far down Deku’s throat as he can go and keeps it there. Deku’s nose is buried into his pubic hair, throat spasming around his cock, Katsuki’s balls grinding into Deku’s chin.
Katsuki feels Deku’s throat contract and ripple around him in a struggle to keep from choking. For a moment, Katsuki is tempted to make him vomit on his cock. He wants to fuck Deku’s throat through it, to make him swallow it. Maybe another day, he thinks. Deku’s body is already sure to be battered, and any more abuse might interfere with his patrol tomorrow night.
Katsuki pulls back until his head is the only thing left in Deku’s mouth, letting him catch his breath. After a brief break, Katsuki begins to thrust his cock into Deku’s slick wet heat, groaning as his cock is fully sheathed.
“Want my cum, you nasty pain slut? Want the cum of a real hero down your throat, huh?” Katsuki pants into the air above Deku’s head.
Deku’s eyes meet his, and Katsuki can almost see how much Deku desires Katsuki to spend inside of him.
With an enormous amount of self control, Katsuki pulls his cock back until only the head remains in Deku’s mouth. Jerking the rest of his shaft with his hand, Katsuki cums with a shout. Before Deku can swallow, Katsuki pulls out and uses a finger to pull his mouth open. Creamy white paints his pink tongue and the plush softness of Deku’s cheeks.
Katsuki lets his fingers slip out, and with his foot he pushes on Deku’s shoulder until he falls on his back.
“Since your throat was a decent fuck, I’ll let you get off. What do you say?”
Looking up at Katsuki, his face a fucked up mess, Deku smiles. “Thank you Sir.”
Resting his heel on the floor between Deku’s legs, Katsuki presses the sole of his boot to Deku’s clothed cock. “I want you to hump my foot like the dog you are. You better get off on that, cause that’s all you’re gonna get.”
With a moan, Deku eagerly thrusts his hips forward. He feverishly rubs his cock against the boot, little whimpers and gasps falling from his lips.
It takes less than a minute until Deku’s eyes are screwed shut, hips grinding his cock into Katsuki’s boot, a pathetic cry leaving his lips as he convulses. Katsuki grins at the debauched scene taking place under him.
When Deku sinks back into the floor, Katsuki gently rolls him over and uncuffs him. Squatting down, he puts his arms under Deku’s knees and back, and with a grunt he lifts him up. In a few steps, he’s at their bed, where he deposits his partner. There’s more to be done, but for now Katsuki gets into bed and spoons Deku.
“Did you like it, nerd?” Katsuki breathes as he pets at Deku’s hair.
He hears a muttered “mmhm” as Deku pushes back into him, greedy for his touch.
Katsuki figures they can stay like this for a little bit before they clean up. With a sigh he buries his nose in the sweaty side of Deku’s throat, and holds his partner close.