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Katsuki knew he was the best goddamn thing on this campus. Everywhere he went, eyes followed him, swoons and sighs trailing after. Not only was he top of his class, but he'd led the varsity baseball team to victory at Nationals three years running, and he had the body to prove it; the broad shoulders, trim waist, perfect ass, and toned legs.
Everyone either wanted to be him or be under him.
And despite the rumors flooding the campus, no one in the student body had caught the eye of Bakugou Katsuki. Despite the claims from desperate extras about their supposed one-night stands with Katsuki, he had never laid a finger on a single classmate from the first day he walked through these university halls.
There was, however, someone on the faculty that had caught his attention and maintained it since that fateful gen ed course during his first semester. Hell, Katsuki was an engineering major and yet here he was with enough history credits each semester that you'd think he was double majoring. All so he could spend as much time teasing and taunting one Professor Midoriya Izuku during class time.
He loved watching the professor catch his eye and stumble over his next lecture slide like a blushing schoolgirl. Loved sending his infamous smirk in his direction, eyes locked and half-lidded, hand trailing down to his lap, just to make Izuku flush like a little strawberry, knowing what would be coming as soon as class ended.
Each hour-long lecture was Katsuki's favorite part of the day. He could watch the professor uninhibited, take in every movement of his energetic rambling, the contortions of his face when he grew particularly fanatic about a subject, the radiating pride when he managed to lead a lengthy discussion with the class.
He was fucking adorable to watch and Katsuki would drink his fill every damn day if he could.
Professor Midoriya was one hell of a man, in Katsuki's opinion. Lithe and hiding a firm body under his nerdy sweater vests, the sweetest apple cheeks freckled to high heaven, a bright smile even at ass o'clock in the morning.
And speaking of his ass…
God, Katsuki loved watching his cock get swallowed up by those round, delicious globes. He palmed each cheek, groaning as the excess spilled between his fingers. Katsuki spread them to give him a better view of that perfect pink hole stretching to its limit to accommodate Katsuki's fat cock.
Izuku moaned and writhed beneath him, earning a hearty slap to his ass as Katsuki continued to plow into the green-haired twink, moaning like a veritable slut bent over his desk. Katsuki slapped his ass again just to watch the freckled flesh jiggle and make Izuku groan. He could make a playlist of just the sounds Izuku makes and play it on repeat forever and never get tired of it.
"Fuck, teach, you're a goddamn slut, aren't you?" Katsuki groaned, leaning over the professor's back, draping over the smaller man, mouthing against his neck. He dragged his tongue up the sweaty column of his throat. "Moaning for me like this. Damn, they must really be paying you shit if you sound like you're whoring yourself out every night?"
"Kah-ah-ah!" Was the breathy response. Katsuki was pounding the higher learning right out of his cute little head. He was just that fucking good.
The professor's slacks were bunched around his ankles, his cherry red boxers stained with cum already.
Katsuki was working on a personal record; get the nerdy professor to cum three times before the next lecture started. He was already building up to number three.
Katsuki's cock squelched lewdly in Izuku's hole, a combination of slick lube and sticky cum bubbling between them. He gripped the professor's hips tightly, grinding deep.
"Nah, I've ruined you for any other cock," Katsuki grinned, teeth snagging on Izuku's earlobe. The smaller man keened, bucking back against Katsuki's hips. His face was blotchy and red, wet with tears and drool. He looked fucking gorgeous. "You can't cum without me, huh?"
"Hnng! Ah, n-no!" Izuku cried, back arching perfectly as Katsuki twisted his hips to snap against Izuku's prostate. "N-Need–"
"What do you need, slut?" Katsuki hissed into his ear, pulling back tortuously slow, dragging his cock slowly from that welcoming, wet heat. Izuku clenched like he didn't want to let his cock go.
"Need…ah, ah! Need Ka-Kacchan…" the professor barely managed to breathe between his moans. He was going delirious, Katsuki knew the oversensitivity was slowly toeing the line into too much.
But Katsuki won at everything. He never failed, never backed down from a challenge. And he had perfected the art of reading Izuku's body, of pulling back when he needed to, and plowing forward full tilt to make the nerd see stars.
"Need Kacchan's cock! Can-Can't come, ah! Need! Please! Please!"
"Bet you haven't come this much since midterms, huh?" Katsuki slowed his thrusting even more, barely inching forward, pulling back until just the crown of his dick rested inside that well fucked hole. "Bet you can't even jerk off without thinking of me… wishing it was me fucking your whore ass, huh?"
Izuku whined, trying and failing to thrust back and fuck himself on Katsuki's now near-still cock. But Katsuki was stronger than the nerdy little professor. He dug his hands into Izuku's hips and pinned his waist down against the edge of the desk so that he couldn't even rut forward in search of something to release the pressure building in his pathetic and engorged cock, dripping between his legs.
That didn't stop him from trying though. Izuku's hips twitched under Katsuki's massive hands, crying and whimpering like he was on the verge of a mental break.
God, he loved fucking his professor stupid. Loved watching this man with his beautiful brain and four degrees get turned into nothing more than a quivering creature desperate to fuck and be fucked.
Katsuki gripped Izuku's chin with his fingers, turning him so he could look over his shoulders at him, see the way Katsuki's abs jumped at trying to hold back from fucking him hard and deep. Emerald eyes flickered down, following the lines of Katsuki's toned body, over the trail of blonde hairs nestled against the base of his huge cock, primed and ready to ram into him.
Izuku whined when Katsuki forced him to look at his face, eyes watery and mouth parting in a helpless keen.
“You want my cock, slut?” Katsuki purred, lips ghosting over Izuku’s in a barely there taunt of a kiss. “You need me to fill you up? Can’t go a goddamn day without my cum in you, huh?”
“Yes! Yes please please Kacchan!” Izuku moaned, tears flooding his face, dripping to the desk beneath them. “Please fuck me, fuck me! Need it, need your cock!”
Katsuki lapped up his tears, humming at the salty sweetness of them. Because everything about his professor was so sweet, from his face to his ass. He sealed their mouths in a frantic, sloppy kiss, tongues tangling and teeth clacking.
“Gonna give it to ya, gonna fuck you up, gonna fucking wreck your ass,” Katsuki hissed, grip tightening on Izuku’s face. “Gonna make sure all you can think about is me.”
“Yes, just you, just you! Please!” Izuku moaned into Katsuki’s mouth.
With a final almost tender kiss pressed to the professor’s lips, Katsuki pressed his face into the wood of the desk, wrapped his massive hand over the back of his head and slammed his hips in, shoving in so deep and so hard the desk scraped forward with a loud shriek that just barely masked Izuku’s loud cry of ecstasy.
Katsuki pounded into Izuku’s ass with abandon, thrusting until he was sure their hips would be bruised, until he felt his muscles burn like he was in a dead sprint for home base. Katsuki threw his head back with a low growl, eyes unseeing, as he fucked the professor into his desk. He felt the coil in his belly tighten and, desperate to hold out until he pushed Izuku into his third orgasm, he reached around to lift Izuku’s hips away from the edge of the desk, palmed his cock and tugged twice before he was coming dry, body spasming. Izuku sobbed out Katsuki’s name and Katsuki finally, finally, fell over the precipice of his own orgasm.
Their chests heaved in tandem, Izuku’s form shivering as he tried to breathe around his tears and Katsuki rubbing soothing circles into the professor’s lower back. Katsuki slowly pulled out and spread Izuku’s ass cheeks. Izuku whined pitifully but made no move to stop him, limbs limp as he lay across the desk.
Katsuki took the time to appreciate the sight of Izuku’s stretched-out hole clenching at nothing, cum oozing down his freckled thighs in slow drips. Katsuki ran a tongue up one of the trails, swallowing the acrid taste of himself, and pushed the leaking cum back into Izuku’s ass, where it belonged, before digging through his bag to pull out a black plug, freshly cleaned. Izuku jerked at the feeling of something new entering him. He blearily lifted his head to stare back at Katsuki, eyes hazy with confusion.
“Shh, baby, just making sure everything stays where it needs to,” Katsuki murmured, pressing a kiss to Izuku’s thigh. “Make it easier for you to think of me during class.”
Izuku thumped his head back against the desk.
“Class is canceled,” Izuku groaned, voice hoarse. “There is no way I can stand up and teach right now.”
Katsuki chuckled. “Still counts though. Got all three outta ya.”
Izuku throws him an unimpressed glare. “I can’t believe you.”
“Well, I never doubted myself for a second.” He laughed, biting tenderly at Izuku’s ass. He squeaked, fumbling for his clothes.
Katsuki helped him redress, letting the professor lean on him as he needed to, unable to keep his legs under him for long. When they were both somewhat presentable again, Katsuki leaned in to trail soft kisses up Izuku’s neck.
“Though if class is canceled, maybe we should head back to my place.”
“I’m not setting foot in your dorm, Katsuki.” Izuku huffed, twisting to glare up at him.
“Fine, your place.” Katsuki shrugged, wrapping his arms tightly around Izuku’s middle. To keep him upright, of course. Can’t have the nerd toppling over and braining himself on the desk.
“You still have class!”
“I can afford one sick day.” Katsuki nuzzled into the crook of Izuku’s sweaty neck. “Might be coming down with something. Need a responsible adult to take care of me.”
“You’re impossible.”
“I’m amazing,” Katsuki corrected.
Izuku just sighed and buried his face in Katsuki’s shoulder, clinging to his sweaty t-shirt.
“Kacchan really is amazing.” Izuku said and Katsuki absolutely did not blush. He definitely did not hide his face in Izuku’s curls. There is no proof.
“Shut up, nerd.”
“Mmhmm,” Izuku hummed. “Let me email my TAs and we can go. I can get us some dinner.”
“You drive a hard bargain, teach.” Katsuki said, tightening his hold on Izuku for another moment before letting him limp over to his computer. Izuku tossed an impish grin over his shoulder.
“Gotta get my fill, right?” he said with a not-so-subtle wriggle of his hips.
“You wanna go for four before we get out of here?” Katsuki growled, though he wasn’t even sure if he had one more in him.
Izuku just laughed brightly and fuck, Katsuki was the best, he could find one more. He prowled towards the professor and snapped him up, hands wandering under clothes already. There was no way he’d back down from this.