Izuku hid under the covers of the futon he set up after Kacchan tossed it on the ground of his room. Izuku tried to put ample distance between the futon and the bed where Kacchan slept. He braced himself for lack of sleep, he wasn't about to be a foolish little omega who would get taken advantage of during the night. Kacchan wasn't like that though, rough around the edges, yes, but he did have a high moral standing even though it was hard to see most of the time. Izuku's heart raced, did he want something to happen? He blushed at the thought, they hadn't even been back together for a full day and his brain was already in the gutter.
Kacchan opened the door dressed in boxers and a loose t-shirt. He clicked his tongue as he noticed Deku on the floor, "Don't get any ideas shitty Deku." Katsuki turned off the lights and made his way to his bed, already uncomfortable with being alone with the omega. He covered himself with his blanket and rested his head on his pillow, back turned to Deku, trying to ignore his presence as much as possible. Katsuki closed his eyes tightly and instantly regretted it. Closing his eyes had only caused him to further focus on Deku's scent. Fuck, that scent made him want to do things. Katsuki covered his nose quickly, what the fuck was the shitty old hag thinking? Shitty Deku, going around flaunting such an intoxicating smell like it was nothing. He didn't even put up a fight at finding out he would stay the night. Doesn't he have any sense of preservation? Katsuki clicked his tongue, how many other alphas had Izuku spent the night with like this? That thought alone enraged him. Wait, why did he even care about what the useless Deku did?
Katsuki sighed as he continued to cover his sensitive nose, there was no way he'd be able to sleep with that smell in his room. Katsuki remained still until he presumed the shitty Deku had finally fallen asleep before he sat up. Deku was going to figure out what he did in the morning, but for now, it didn't matter. He was tired and needed sleep, and that was not going to happen with the way the shitty Deku was smelling up the place. Katsuki walked over to the futon where Deku was sleeping and contemplated the possible repercussions of his actions. He huffed, he didn't give a fuck what others would think. Katsuki carefully pulled back the cover and clicked his tongue again, how could the shitty Deku be so defenseless, did he really have no self-preservation? He reached out and rubbed his hands on every bit of exposed skin, scent marking Izuku so heavily even Betas would be bound to notice. It wasn't until Izuku's scent practically disappeared underneath his musky alpha smell, that he was satisfied with his work. He almost felt bad for Deku, because no one would dare to approach him with his scent all over the smaller omega. Katsuki leaned down to make sure it had worked, hovering over the smaller. He carefully scented the area around Deku's neck and took in his scent one last time. It was definitely less noticeable now that it was covered almost completely with his scent marking. Katsuki took another deep inhale and closed his eyes to enjoy the mixture of their scents mingling together.
He opened his eyes quickly and pulled back almost as if he had been burned at the realization of what he was doing. Katsuki stumbled as he pulled away from the smaller and landed square on his ass. He clicked his tongue as he stood, what the fuck was wrong with him? Katsuki threw the cover back over the sleeping boy, satisfied for now that Deku's scent was nulled by his own strong scent. He, however, had a different problem now, more specifically one in his pants. "Shit," he mumbled, "stupid Deku." Katsuki moved away and quietly exited the room to go take care of a certain problem without the other noticing. He'd been damned if Deku ever found out about what happened.
Except that Izuku was all too aware of what happened. He peaked his eyes open after he had heard the door close. Izuku swore that he had never felt his face heat up any hotter in his entire lifetime. Thank god the room was so dark, otherwise, the redness in his face would have instantly alerted the alpha. He hadn't been asleep when the alpha had approached. Izuku was having trouble sleeping after being surrounded by the alpha's scent everywhere. He had closed his eyes and feigned sleep so as not to anger Kacchan as he approached. What he wasn't prepared for, however, was for Kacchan to scent mark him so heavily he practically smelled like the alpha himself. Izuku almost blew his cover as soon as he felt Kacchan's warm hands on him. His heart was racing so much he was surprised Kacchan didn't notice as he rubbed his scent all over. Izuku almost passed out from holding his breath when he felt Kacchan's breath against his neck as the alpha hovered over him. Luckily Katsuki pulled away just in time for him to take a shaky breath. Izuku hid his face behind his hands as he reviewed what had just happened, trying to piece together everything.
Why in the world would Kacchan scent me? Izuku's heart sank as he realized Katsuki had covered his nose earlier at the sight of him. I guess Kacchan hates the way I smell that much. Still, moments like these are not good for my heart, I thought I was going to pass out. Izuku shook his head, trying not to get too hopeful about being anything more than childhood friends with Kacchan. Hell, Izuku was almost positive the alpha wanted absolutely nothing to do with him. An alpha like that needed a worthy omega equivalent to match. Izuku was not that equivalent, and that weighed heavily on him. He burrowed deeper into the futon he laid on and closed his eyes in a last ditch effort to get to sleep whilst the alpha was gone.
Katsuki stumbled back into the room after he had taken care of himself in the bathroom. He glared down at shitty Deku tempted to kick the other awake, but instead carefully avoided stepping on the boy on the floor as he made his way to his bed. There was no way he would ever let him find out he masturbated to him because of his intoxicating scent. Still, he wasn't quite sure how he would explain the scenting in the morning. Katsuki decided that was an issue he would have to deal with in the morning. For now, he was focused on finally getting some much needed precious sleep. Katsuki was tired, body sore from his run, and he was crashing after the high from the relief of his session. Soon, his eyes seemed to get heavier and heavier and he fell asleep.
….
It had been over a week since he had last seen Deku. He was gone when Katsuki had awoken the next day to find only a folded futon, put neatly in the corner. It pissed him off to no end, shitty Deku probably thought he was some pervert who molested him in his fucking sleep. Katsuki stuffed his hand in his pockets, at least today was the U.A. entrance exam and he could finally burn off some steam. U.A. was known for having an extremely dangerous entrance exam. Katsuki grinned, I'll blow them all away. He was excited after all this was the school All Might went to, and if it was good enough for All Might then it was worthy of Katsuki's time.
Izuku was also taking the entrance exam to U.A., however, due to his circumstances his entrance exam was different than the typical hero simulation. Instead, he was brought before a board of teachers to explain why he was a worthy candidate of their scholarship program. Even if U.A was a school that typically went against major regulations, it was still a school. Every so often they accepted certain 'special cases' if they happened to actually bring something to the table. Now, they had never particularly admitted quirkless omegas into the hero academy, most 'special cases' tended to be students with bad grades, or weaker quirks but amazing intellect. But that didn't mean it was impossible and that was a chance Izuku was willing to take. Izuku looked toward the committee of teachers, fully prepared to advocate for himself as to why he was worthy of being admitted despite his limitations.
….
Katsuki had naturally been accepted to U.A. as the highest scoring teen in his age group. It was a given, he was the best after all. He took a seat at a random desk in front of a red-headed guy with shitty hair, when he smelled it, "No fuckin way," he growled. Deku tensed as he received the brutal force of Katsuki's glare as he stepped into the classroom. If looks could kill, he was sure he would be dead a thousand times over. Izuku gulped as he made his way to the only remaining seat in class, directly in front of the murderous teen. No wonder no one else had dared to sit in the chair.
"Oi, are you an omega?" A boy with blond hair and a black streak in it asked bluntly as he sat down. Izuku gulped, "Yes." The boy sat up straighter in his chair looking at Izuku with awe, "Woah, I didn't think there would be any omegas in the hero course, they tend to go more for the support route."
"Yeah especially shitty quirkless omegas," Katsuki sneered. Izuku pursed his lips and looked down at his lap, the words stung. The red-head perked up, "Woah really and you still got admitted? That perseverance is so manly!" Izuku blinked, surprised by the reaction. He'd been bullied his entire life because of it, but at U.A. he was being praised? Katsuki clicked his tongue as he angrily put his feet on top of his desk with such force the other two immediately shut up. Izuku couldn't help but smile softly.
Katsuki glared at the back of the shitty Deku's head, no way was he going to have to sit through class every day with the omega sitting in front of him. "Oi- shitty Deku, hurry up and move sea-," He was silenced by the entrance of some insomniac looking motherfucker in a sleeping bag. The class watched as the man shed his sleeping bag and stood in front of the class, "It took you five-seconds to settle down, get better or you're all expelled." Katsuki glared at the teacher, he would have to deal with the shitty Deku later.