Chapter Text
Izuku walked into the class on silent feet and made a beeline to his desk. No one noticed him. It wasn't like it was their fault either. Izuku had no presence whatsoever and was trying to go unnoticed today. He needed to be home early, so his mother knew he wasn't up to anything. The last three nights, Kacchan had kept him late. Apparently, after years of brutal smackdowns, he still hasn't ‘Learned his lesson.’ After doodling some new heroes that just debuted in his notebook, he listened to the teacher drone on. Something about how to find the radius of a circle.
Five minutes before the bell was about to ring, his teacher made an announcement. “Now you all know this will be your last year at Aldera. Everyone has submitted their high school requests. I have placed them on the chalkboard at the back. If there is a star next to your name, that means you may want to consider other options-” Izuku immediately started tuning out the teacher, knowing where she was going. Finally, the bell rang. Izuku grabbed his things to leave when Kacchan stalked up to him. His quirk crackled in his palms.
Kacchan was mad. Izuku could tell because he could hear Kacchan's angry growls. He could feel the anger coming off him in waves and the look on his face. He was PISSED. Unfortunately, Izuku had a feeling he knew why. He glanced over to the chalkboard at the back. His suspicions were confirmed. There sat Izuku’s name in neat print under U.A. Highschool with a red star next to it.
After everyone else filed out of the room, Kacchan spoke, “Why the fuck do I see your name on the board next to mine, you useless freak!” “Well,” Izuku began, only to be cut off before he could answer. “Actually, I don't care why. It's not like Yuuei would let in a freak whose quirk gives him shitty ass fangs. Just go be a villain so I can defeat you properly!” He sneered. “Or, better yet. Take a swan dive off the roof! Then at least you'll do us all a favour!” He said, his tone filled with malice.
After the verbal mocking, Izuku knew what came next. The punishment. Kacchan picked Izuku up from the scruff of his neck and threw him across the room. Izuku was small and didn't weigh very much, so it was only mildly impressive. He stalked over to Izuku and began shoving his head into the wall. Over. And over. And over.
He was losing consciousness. Kacchan had only just begun. He was shoved into the wall one last time with a sickening crunch coming from his nose. Something was definitely off, Kacchan beat him up all the time, but he never broke noticeable things like his nose. Kacchan grabbed a knife from his bag and began writing Deku on both his wrists and calves.
Izuku was losing blood fast. His nose, head, wrists and ankles were overrun with blood seeping from all directions. His sickly pale complexion was becoming whiter and whiter. His pupils were fully dilated, with no iris insight. His fangs seemed to elongate, stopping at about 2.5 more centimetres than they had been before (1 inch). His mind screamed: Prey! Prey! Prey! His senses screamed to attack , getting louder and louder.
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Kacchan could immediately see the change in Izuku's demeanour. He knew the damn nerd thought he was better than him, but this was new. He couldn't believe that the freak was finally ready to fight him for real. Ever since Izuku’s quirk came in, he had been weak. He grew fangs and became paler and paler every year. Other than that? Nothing.
They were supposed to be a hero duo together! He had left Kacchan alone to do it. Yet, that damn nerd still acted like he was better than him. He still offered his helping hands, even though he was strong enough by himself. He still mumbled like an idiot and gave the sweetest smiles, even if he was covered in burns, blood or bruises.
But now, his stupid smile was gone. It was replaced by a calculating and feral look. The soft creases below his eyes vanished, the hopeful glint in his eyes left behind. He was finally ready to fight Katsuki for real. He was so excited to take that useless waste of space down a few pegs.
His lackeys were in the hall outside the class. He went to let them know that he would be there for a while. No, he didn't care for them, but he really didn't want them interrupting. “The nerd looks like he is actually gonna fight back! Why don't you all go home while I make sure he never gets that idea again!'' Katsuki declared. Each of his lackeys gave him wide grins before they left.
Finally, alone, Katsuki lifted Izuku up off the ground out of his pool of blood and gave him a second to centre himself. The nerd was still looking at him like he was weak. Like he wanted to attack him and thought he would win. That wouldn't fly so, Katsuki fired off some warning shots of his quirk and darted to Izuku. Izuku looked up to meet his eyes then, everything went black.
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Izuku didn't know what was going on. Kacchan’s lackeys had left, while Kacchan himself looked positively feral. His gaze was filled with anticipation. He was in a fighting stance. Izuku himself was still trying to understand what was happening. Whenever he looked at Kacchan, his mind screamed: Prey! Food! Hunt! Blood! He still didn't understand why because these seemed like the opposite of survival instincts . Then suddenly, Kacchan lunged at him. Their eyes locked. His body immediately moved out of instinct, grabbing Kacchan and biting down into his neck.
A single drop of blood landed in his mouth. And suddenly, he started sucking vigorously on Kacchans neck. It wasn't enough. It would never be enough: The blood tasted sharp and bittersweet on his tongue. A phenomenal and tangy sensation filled his mouth. He finally understood when addicts said they could never get enough. The red colour was staining his lips and the smell, Oh god, the smell! Nothing compared! He felt like he was floating. He was filled with endorphins. Each deep gulp he took made him feel stronger and stronger. He knew that he would feel bad when it was over, but right now, he felt astonishing.
Suddenly, the door to the classroom door opened, three of Kacchans lackeys walked into the class to retrieve their bags. They assumed Izuku would be on the floor, singed and battered. When they looked over, they were horrified. There stood an unmoving Kacchan being fed on by Izuku. They exchanged shocked glances and slowly started retreating to the door. Before they made it three steps, Izuku was upon them, shoving his fangs into each of their necks efficiently on instinct. After Izuku’s fangs punctured skin, his victims were paralyzed. So, there he was, basking in the glory of drinking the blood of four people. He drank ravenously, slowly sating his bloodlust.