At UA high, most days were pretty normal. Everyone went to class, studied there lessons, did there homework, and made a lot of friends. All year round, things were great at UA however, during mating season, things got a little hectic. Hormones were always heavy and the only thing most people could think about was mating. It was everything to them. The teachers did not get involved with the students sexual lives and they liked it that way, because now they were able to handle things themselves.

For those with significant others, mating season was easy because it was literally just one on one all the time. Some people liked to make deals with people, for instance, they'd be each others mating partners until the season was over and the tension was low. Some people just fought through it and did there best not to mate with anyone.

However, for some people these methods weren't that easy. Katsuki Bakugo was one of those people. As a wolf and as aggressive as he already was, he didn't exactly want just one partner yet. The idea of one would be cute in the future when he settled down, but right now there was too many fine opportunities in front of him. He wanted to mate with as many people as he could; not only to satisfy him, but there was also something about having your scent attached to someone to let the world know that they belonged to you that drove him crazy. Everyday he looked around and he wondered who would be his first mate for the beginning of the season.

As he sat in his second period class, he stared directly at the boy in front of him and knew exactly who it was going to be. Izuku, who was a rabbit with long green ears and a cotton tail, sat bouncing in his seat eager to answer a question aizawa had just asked. It pissed bakugo off how izuku would wiggle his tail whenever he got excited about a question, let alone getting it right. Izuku also had this thing where he'd arch his back every now and then and katsuki couldn't help but wonder if it was to attract anyone who would want to mate with him. The anger izuku gave him actually made bakugo excited at the same time. Yes, izuku was the first one he'd be taking this season.

Later that day, izuku was alone packing his things into his bookbag. The day was ending and most people had headed home; aizawa had answered any remaining questions izuku had wanted to ask and then he told him to lock the room when he was going to leave. So, izuku took his time packing everything with a small smile on his face. What he didn't know, was that he wasn't alone.

Izuku had failed to notice the door open, but when the person who opened it grunted izuku spun around. "Oh..hi kacchan."

Katsuki didn't say anything, he just stared at izuku and he could tell the smaller male was becoming nervous. He swished his blonde tail a couple of times before entering the room and shutting the door behind him. His ears twitched a little and he was slowly starting to become excited, but he did his best not to show it.

"If you want to use this room for something, y-you can. I was just leaving anyway." Izuku said softly as he continued packing his bag. He tried to stay calm but it was a little hard once he felt katsuki right behind him. Izuku felt his ears drop and he didn't exactly know what to do.

All of a sudden he felt bakugo gently hold on to one of his ears and he flinched. "Where are you going deku?" katsuki asked in his usual harsh tone, just a little quieter.

"W-Well, the day's over so I was…just..gonna go…ha-home…" Izuku struggled to finish his sentence when he felt bakugo rub his finger along his ear. "k-kacchan..that feels weird..ha-haa."

"Weird…" bakugo smiled and squeezed izuku little tail. "Or good deku?" he smirked menacingly once izuku's face went red and he leaned against his desk.

Izuku knew exactly what was happening to his body and he was soon going to reach the point of no return. His knees buckled as katsuki began to touch him more and more in different places. "W-What're you doing?"

"Making you my first kill," bakugo growled into izuku's ear and pushed him down onto his desk. "Be a good bunny and let it happen."

"A-ah! Wait!" Izuku cried out when bakugo licked up the side of his neck before biting down. Izuku felt his mind race and he was almost at his limit. Once katsuki reached down and grabbed izuku's ass, he was officially in heat.

Bakugo froze for a moment and inhaled the sweet scent coming from izuku. It made his mouth water and his mind race. He looked down at izuku and the sweet bunny looked back up with half lidded eyes and his face completely red. "You smell like you wanna be fucked!" Bakugo teased and izuku hid his face in shame. "Don't hide from me!"

Bakugo pulled izuku up by one of his ears. He flipped his around so that he was lying on his back. "This is gonna feel so fucking good, I know you gotta be tight deku" katsuki cooed as he pulled down izuku's pants and boxers. The other male didn't stop him but he did complain.

"D-Don't say that! It's embarrassing…" izuku mumbled and covered his mouth.

"It's embarrassing because it's true" bakugo stated and once izuku was revealed to him, he couldn't help himself. "What a slutty bunny" he said before dipping down and licking izuku's hole.

Izuku's eyes shot open and he gasped. "N-No! Kacchan, not there! Not…there aah!" izuku whined and moaned and katsuki only took it as a sign to continue. He licked and sucked at izuku's hole until it was coated. He stuck his tongue in just to watch izuku arch his back and begin to drool. He stood up and wiped his mouth.

"You taste as sweet as you act." Katsuki growled. Izuku wasn't sure if he should take it as a compliment or something else because as nice as it sounded, bakugo didn't hesitate to shove one of his fingers in izuku and move it around immediately. "God damn deku"

"A-aaah! Aahh kac-channn" izuku moaned louder and louder as katsuki added another finger and moved in a scissoring motion. "Pleeaase kacchan…"

"Please what deku?" katsuki teased and izuku covered his face.

"…Mark me." Izuku mumbled but it wasn't enough for katsuki. Even though he was aching to ram himself into this bunny, he wanted him to be proud of it.

"Say it again, but louder" bakugo growled and removed his hands from izuku's body causing the other male to gasp and whimper. "Or I won't fuck you at all."

"Mark me!" Izuku cried out and started to stroke himself. "Please kacchan, I want it to be you who marks meee"

"Damn deku," katsuki growled as he immediately slid his aching member into izuku without warning. "You must've really wanted me huh?"

"A-AH! YES!" Izuku shouted and dug his nails into katsuki's back. "I-I needed it"

Bakug growled before pulling all the way out and ramming himself back into izuku. The bunny cried out as he was fucked mercilessly by his wolf. There was no doubt that izuku would be playing this scene in his head over and over again throughout the season and whenever he wanted sex he'd search high and low for katsuki.

As bakugo continued to thrust into izuku, izuku's eyes rolled to the back of his head and he knew what was coming. "K-Kacchan…I'm…cu-cumming!" Izuku barely finished his sentence before he released all over his own stomach and a bit of katsuki's. The sight of it all had drove bakugo wild and it only made it worse when izuku clenched as he came. Not long after, katsuki came into izuku and he made sure not to pull out until every last drop was out of him.

Once they both finished riding there orgasms out they collapsed on top of each other. They waited a minute to catch there breath before both boys sat up to take care of themselves. "T-Thank you for claiming me this season kacchan." Izuku stated shyly as he wiped himself off and got dressed.

"Mm-hm, don't you DARE think about touching anyone else or I'll literally eat you. As of right now you belong to me and when you are in heat you'll come to me, got it?" bakugo asked as he finished getting dressed.

Izuku nodded quickly and bakugo picked up his bag and headed for the door. "Good…oh wait" he said and turned on his heel. Izuku wondered what he had forgot but he was confused when bakugo walked straight up to him.

Soon his confusion melted away when bakugo leaned down and kissed him fiercely. He bit at izuku's lip until he was granted access. Once inside, Katsuki explored every inch of izuku's mouth and only stopped when he heard the other moan. He pulled back and patted izuku on his red cheek. "You should've known you were going to be my first mate, you always are every season."

With that, bakugo turned and left the classroom leaving izuku with a big grin on his face.