"Alright, class is dismissed. Bakugou? Stay behind."
Katsuki narrows his eyes and huffs as the rest of his classmates shuffle out of the room. What the fuck had he done now?
His grades are impeccable and he had passed the last bullshit training exerscise with flying fucking colors. As if these extras are anything close to him.
The look on their sensei's face is enough to have the crowd filing out faster than usual, the room seemingly empty in record time. Katsuki stands, his bag slung over his shoulder, and slowly makes his way to the front of the empty room, hands shoved dutifully in his pockets.
Aizawa looks as haggard as always, capture weapon wrapped around his neck, his usual all black ensemble paired with the trademark dark circles under his eyes. He looks more exhausted than usual, or maybe Katsuki just has that effect on him, because he's letting out an exasperated sigh as Katsuki leans against the desk closest to the window in the front row.
"I don't have all day. The fuck do you want?" It's pretty tame for Katsuki but he's been working on how he address his teachers since the last time he said "fuck" in front of All Might and his childhood hero frowned at him.
Aizawa looks done with him already when his eyes narrow.
"I'll make it quick. Good grades and talent will only get you so far. You need to learn to cooperate and be civil with your classmates. They will one day be the heroes at your side, maybe one day saving your life."
It's perfectly sound and reasonable advice. It's something Katsuki has heard more than once from other teachers and even his mother, but coming from Aizawa's almost hostile expression does something to Katsuki's insides that has him clenching his fists at his sides.
"That's all you wanted to say? Fuck off."
Aizawa's eyes seem to narrow even more as he stands behind his podium.
"You would do well to watch your mouth, Bakugou. I am still your teacher, despite your God complex."
Katsuki scoffs and drops his bag on the floor to take a step in his sensei's direction.
"I'm supposed to respect you because of that? You're a washed-up ass wannabe who got saddled with teaching cause you couldn't cut it. It's really fuckin pathetic if you ask me."
Aizawa's knuckles are almost translucent as his fingers tighten around the edge of the wooden podium. Katsuki doesn't give two fucks how pissed he is or how the anger he's feeling makes his teacher's eyes widen at Katsuki's every word. Fuck him.
"Get. Out." The words are said behind clenched teeth, and Katsuki grins because this is a rush and who is he to deny himself this?
"Out? What, can't handle the truth?" Katsuki is pushed forward by whatever force is possessing his body to berate and antagonize his sensei. It's like he's riding a high and he's only getting higher with every word he spits in his teacher's direction. "I'll go on to become Number One while you're stuck here teaching more wannabes 'Hero 101.' I don't need anyone else, but you?" He laughs, loud and ugly. "You dont have anyone anyway, so the fuck would you know?"
Katsuki is still prowling forward, and, when he makes it to the podium, he kicks it because why the fuck not? Aizawa takes a step back, his back almost pressed to the chalk board as he stares at Katsuki, utterly speechless.
"What? Nothing to fucking say, teach? You really that fucking pathetic?"
Aizawa looks absolutely terrified, and Katsuki has never felt so fucking powerful in his entire life. He's a breath away from ripping the older man a new one when he notices it. Katsuki is certain he's imagining it, there's no way he's seeing what he thinks he is. But another step forward, and its so painfully obvious he actually fucking laughs.
"Are you fucking hard from this?"
There's a tent in Aizawa's black pants, a sizeable one, and Katsuki cant fucking believe what he's seeing. His sensei is breathing so heavily that Katsuki can see it, hear it. But he can't stop now, and he takes another step forward, Aizawa still silent and watching Katsuki like the younger boy will suddenly lose it and blow the place sky high. He almost looks panicked, and when Katsuki moves to step into his space, Aizawa is tripping over his own feet until he falls on his ass directly in front of Katsuki.
"You like being yelled at by a fucking kid, old man?" God complex? Yeah, Katsuki felt like a fucking god right now. Aizawa, fucking Eraser Head, a god damned Pro Hero was sitting at his feet with a fucking boner. It's happening before he knows what he's doing.
Katsuki takes that final step into Aizawa's space and his boot is pressing into his sensei's still very prominent erection. The rush of power is like a drug, and Katsuki has never been so high.
He pushes just a little harder, and Aizawa is shaking as he stares back at Katsuki, pupils dilated so far that Katsuki can't make out the color of his irises anymore.
"Fucking pervert. Getting off on this. Is this what you do all day? Daydream about fucking your students? Huh?"
The sound that leaves Aizawa's throat has the hair on the back of Katsuki's neck standing on end. He puts his weight into it and grinds his heel against the base of the still hard dick under his boot. Aizawa is moaning, broken and breathless, and Katsuki can feel him shifting under his foot.
"Are you really going to sit there and hump my fucking boot like a dog?!" It's too fucking ridiculous to be anything but funny, and Katsuki is barking out a laugh before he can stop himself. "You really are just so damn sad."
Katsuki can't take his eyes away from the man at his feet, the not-so-subtle movements under his boot getting more pronounced the longer he looks.
Katsuki wants to test it, see just how far he can push it before the Eraser Hero finally calls it quits. They are in a classroom after all. He's moving his boot away, Aizawa groaning from the loss before he's sinking his teeth into his own arm to quiet his moans when Katsuki's boot returns, firmly planted on his balls.
"You gonna come like a little bitch under my boot, old fucker?"
"Ba- fuck -Bakug-"
He sounds nothing like the teacher Katsuki listens to everyday. That bored expression is being replaced by the most desperate look Katsuki has ever seen, and it has Katsuki pushing his boot that much harder into Aizawa's crotch.
"What was that? I couldn't hear you."
Aizawa is struggling to speak. Katsuki watches him try again and fail. He's getting tongue tied, breaths coming out in harsh huffs as he struggles not to full-on rut against Katsuki's boot.
"My question is; would any student do it for you? If it were fucking Deku and his ugly ass red shoes would you be as desperate for it? What about round face? Or maybe… it's just me."
Katsuki looks downright feral when Aizawa's hand comes out to grab his ankle like he plans to push Katsuki's foot away and end it.
"Go ahead, do it. If you can." Katsuki shifts all of his weight onto the foot trapping Aizawa's balls and the older man is choking on his own breath. "I'll tell you one thing, you're right about the god complex shit. Because I'm your fucking god right now."
"Please." Aizawa wheezes.
"It's really pathetic when you beg," Katsuki snorts in response.
He removes his boot and stares at the hard on straining against the fabric of his sensei's pants. Aizawa looks so fucking wrecked lying on the floor like he's ready to beg for it. Katsuki smirks, cause fuck if that doesnt make something inside him burn for it.
"Take your fucking dick out, old man."
Shame is coming off Aizawa in waves. His hands are shaking when he reaches for his belt, and Katsuki wants to laugh again, because even with how red his sensei is from the shame, he looks so fucking hungry for Katsuki to step on his dick again.
Aizawa struggles to undo his belt but he finally manages even with his hands still shaking. He pulls down his zipper and his cock springs up, hard and red and leaking ridiculously in the air.
"Fuckin' hell, of course you go commando during school. Fuckin' pervert," Katsuki sneers, disgusted.
Aizawa goes to grab his cock, fingers wrapped around the base, and Katsuki kicks his hand out of the way. "No one said you could touch."
The groan from Aizawa's throat is quickly followed by something more animal than human when Katsuki's boot comes to stop on his sensei's bare cock. His entire body is damn near vibrating, and the harder Katsuki presses, the worse it gets. He digs the tip of his boot into the leaking head, a wet spot forming against Aizawa's shirt and the small patch of skin Katsuki can see from where the shirt had ridden up.
Aizawa moans loudly and has to smack his hand over his mouth to muffle the sounds as Katsuki grinds his foot into Aizawa's dick mercilessly. Katsuki applies more force, and his sensei is lifting his hips to rut against the tread of Katsuki's boot.
Katsuki can hear it, the wet sound of Aizawa fucking himself against his boot, and, for a minute, he's unable to do anything but watch. He cant figure out who the fuck the man is on the floor, because it can't be his sensei. It's just too fucked up.
"F-fuck...harder."
It comes out so breathless and low that Katsuki isn't sure he heard it until his and Aizawa's eyes meet. His mouth is open on a silent gasp when Katsuki leans all of his body weight into it, and Aizawa comes with a guttural moan that's muffled by his own shaking hand. Katsuki can feel his sensei's dick throbbing under his foot as it shoots ropes of thick spunk all over his shirt and stomach.
Aizawa's arms give out, and he collapses to the floor, chest heaving as he struggles to suck in enough oxygen to fill his lungs. Some of the mess is sticking to the bottom of Katsuki's boot, and he pushes his boot into Aizawa's softening sensitive cock in annoyance before backing away. His sensei refuses to look in his direction.
Katsuki is saved from whatever fucked up conversation they might have had when the bell for his next class rings. He grabs his bag from the floor where he dropped it and promptly leaves the classroom, not bothering to stop when he hears Aizawa call his name.
Unfortunately for Katsuki, his last class of the day is with Aizawa. So, even after leaving and cleaning the mess on his boot in the bathroom and getting a dirty look from Midnight when he shows up late for his next class, Katsuki still has to see Aizawa again.
He walks into the class as annoyed and irritated as he always does, taking his usual seat in the back by the window. Aizawa stands at the front of the classroom looking like he always does, like he'd rather be anywhere but teaching a room full of ungrateful kids. Katsuki isn't paying attention, but their eyes meet for a brief second. The older man looks anything but bored when his eyes land on Katsuki, fire burning hot behind the gaze as it sweeps over Katsuki a single time before returning to the other students in the room.
It's like that for the rest of class. Aizawa is in the middle of his lecture, asking questions and letting random people answer. His eyes land on Katsuki with that knowing look, and Katsuki finds himself searching for his sensei's attention. There is power in those eyes, and Katsuki knows just how to use it.
The class ends like it always does and just as everyone is filing out Katsuki hears those familiar words.
"Bakugou, stay after class."