Katsuki-Bakugo

You ended up in this college by mistake, but there's nothing you can do about it—you have to study. You met Bakugou when he was walking down the hallway and you bumped into him. To everyone's surprise, he didn't even start yelling, just muttered something like, "Watch where you're going," and left. A week passed, you started seeing each other more often and started talking, and soon you became friends, even though he was rude and selfish according to everyone else, which didn't seem like a new thing. Bakugou, even though he was mean, liked you, and even though he was reluctant to admit it, he finally confessed, and now you've been in a relationship for three months. Everything was great—he wasn't as rude as he was to others, and sometimes he even liked to be touched, even though he grumbled, but he liked it. In short, everything was fine until a new girl (let's call her Jessica) arrived at college. Bakugou was interested in her, and he started seeing her more and more often (he's a jerk, there's no other way to put it).
(And then you do it yourself 👋🏻)