Izuku was a quirkless loser, he'd always wanted a quirk like all the other kids but it never developed. He didn't have any friends as everyone thought they were 'too good' for him, he always runs around the city watching villains getting taken down by heroes with amazing quirks. He goes to Aldera Junior High where one of the other kids, Katsuki gives him an extra hard time. Katsuki and Izuku have known each other since they were kids, they weren't close but they were still friends until Katsuki developed his quirk. He's able to turn his sweat into explosive blasts, ever since that developed he changed, becoming a bully.
Izuku was walking down a corridor in school when Katsuki walked by, shoving himself into Izuku, knocking his books out his hand. Katsuki is taller than Izuku, he also has a slim but muscular frame, topped with ashen blonde hair.
"Hey!" Izuku said, falling to the floor. Katsuki turned, flashing his crimson eyes towards the dark haired boy on the ground.
"What? What're you going to do about it, loser!" Katsuki said angrily. Izuku's eyes shot open as he went slightly red, knowing that there was nothing he could do to his bully.
"Exactly, you're just a quirkless loser. There's nothing you can do." Katsuki started laughing as tears welled up in Izuku's eyes.
"Go... Run back to mommy!" Katsuki laughed at the short, green haired boy. The rest of the day was like normal. Izuku going about as he normally does and Katsuki giving him insults on how he hasn't got a quirk or giving him dirty looks.

The next day they had gym class at the end of school. The class went as normal, Katsuki showing off to the rest of his class with his impressive physical abilities, the rest of the class going about as normal and Izuku hiding in the back, not getting that involved. In the locker room after class, everyone was either getting changed or leaving. Katsuki was getting changed slowly, talking to his friends whilst Izuku got dressed quickly but stayed behind to add some stuff into his diary. Katsuki's friends left, leaving Izuku alone with him. Katsuki was only dressed from the waist down, excluding his socks and shoes, leaving his lean muscled torso on show. Izuku looked around, seeing that everyone had left but then he made eye contact with Katsuki. Katsuki's abilities definitely resembled his attitude, explosive. If he saw something that he didn't agree with or like, he blew up with rage. Katsuki's eyes narrowed as his brows scrunched.
"What're you looking at? Quirkless fag!" Katsuki spat as he started walking towards Izuku, watching him panic a little as he got closer. Izuku started packing away his book into his bag.
"I asked you a question, loser!" Katsuki said, standing above the smaller boy.
"Oh... I... er..." Katsuki had tuffs of ashen hair under his armpits, defined muscles and a small trail of hair leading into his waistband. Izuku didn't know what to do.
"I know... You were checking me out. That's why you stayed back, wasn't it?" Katsuki said whilst laughing.
"What? No!" Izuku said defensively. Katsuki knew he had all the power in this stand off. An idea came rushing to his head as he watched the defenseless teen in front of him.
"Yeah you were... I bet you dream about me fucking you, don't you?" He said, rubbing his crotch through his trousers. Izuku watched, not knowing where this was going.
"All you had to do was ask and I'd show it to you." He continued. Izuku's eyes rolled down the taller teens body, looking at all the features and muscles, eventually landing on the bulge in Katsuki pants. Katsuki kept rubbing as he looked at the messy haired boy in front of him. Katsuki wasn't gay but he sure was horny.
"Get on your knees fag!" He ordered, dragging Izuku on the floor. Izuku landed on the floor hard.
"Ahh..." Izuku said in pain. Knowing he had no choice he did as he was told. The sound of the zip on Katsuki's trousers echoed through the empty changing room. Izuku watched as Katsuki took his trousers off, leaving him in his short boxer shorts. His visible semi erect dick was pinned up against the fabric.
"Take these off... With your teeth." Katsuki ordered. Izuku slowly leaned forward, hesitating, trying to see if this was just some prank Katsuki was doing. Eventually he was closer to realized that this was no prank. Izuku has thought about what his bully would look like naked but he didn't want it to happen like this, he wanted it on his terms. Izuku teeth met the waist band and started tugging and pulling. He could feel tangles of pubic hair graze his lip as he moved down. He tugged the boxers down, feeling the lump of meat under his chin as he did. Eventually the boxers fell to the floor, revealing Katsuki's large, uncut cock. It slightly bounced as blood filled it more. His balls dangled low beneath, ashen hair covered the base of the dick and sprouted on his balls.
"Start sucking!" He demanded, putting his hands on the back of the quirkless teens head. Izuku tried pulling back but to no avail. Soon, his mouth was pressed against the taller teens sweaty cock.
"Come on. I know you want this!" He smushed Izuku's face around, tickling him with his pubes as his dick extended more. Finally, Katsuki's cock was fully hard and pinned against Izuku's round cheeks.
"Open up or I'm going to start blowing you up like the worthless piece of shit that you are!" Izuku started panicking more, he opened his mouth slowly but when it was open enough, Katsuki forced his large pole in.
"Oh... That's what I'm talking about!" He yelled and moaned. He started picking up the pace more and more, his balls slapping on Izuku's chin. Izuku has never even seen anyone elses dick before, let alone sucked. Everytime Katsuki's cock hit the back of his throat he gagged and gasped for air. Katsuki started getting bored.
"Stand up and turn around." He ordered. Izuku did as he was told, not wanting to get hurt any more than what he was going to be. The ashen haired teen hooked onto the waistband of Izuku's pants and aggressively pulled them down, revealing two, firm, round lumps. He got down and spread the smaller teens ass cheeks, showing off the pink hole in front.
"This will do nicely..." He said coldly. He stood back up and pressed the head of his cock against the hole. He slowly pushed forward, forcing the head to part the pink hole and forcefully enter the virgin ass in front.
"Fuck yeah!" Katsuki screamed, pushing more and more of his dick into his victim. Eventually, his whole cock was hidden inside, his balls pressed against Izuku's and his pubes pushed against the round ass. He could feel how much smaller the green haired boys balls were compared to his own as his were pressed against Izuku. He moved out and thrusted into him quickly, he could feel a small trickle of blood surround his dick as he tore the ass open in front with how aggressive he was. He quickly started slamming his hips against Izuku.
"You fucking love this don't you fag!" Katsuki screamed, slapping his balls against the young teen. Izuku was in soo much pain and pleasure as he was pushed back and forth against the locker room wall.
"You're soo fucking tight!" He grunted, pushing further and further into the teen.
"Fuck yeah! Here it comes!" Katsuki screamed with one final thrust, pressing his weight against the quirkless teen. Izuku could feel the hot cum flood his ass and fill his stomach. As much as he hated the fact that he had been raped he couldn't deny the fact that he was soo turned on. Katsuki slowly pulled his deflating cock out of Izuku with a pop as the head passed the used ring of muscles. Cum fell out of the abused hole, falling on the floor and in Izuku's trousers. He turned around, pressing his ass against the cold tiles.
"Ha! Even your dick looks worthless. Look at you, all hard when you acted like you didn't want it." Izuku's dick was just smaller than average but so was his height, his balls fell short than average too. He had a small green mass of pubic hair resting above his hard dick.
"If you think I'm going to return the favor, think again. Nerd." Katsuki says, walking back to his clothes to get dressed. When he had his clothes on he left Izuku in the room alone. Blood and cum escaped his ass more as he wrapped his hand around his dick and pumped it quickly. firing his own jizz into the air before leaving.