You've been hooking up with Katsuki Bakugo even though you're in a relationship.
Nothing excuses cheating bla bla, you didn't care about that. What you cared about is that your boyfriend was a jerk. And not just stupid or annoying but actually a mean person. He was a narcissist. And you couldn't do ANYTHING to make him leave or to actually be able to escale this relationship. And it wasn't even boyfriend/girlfriend anymore, it was like a prison. You didn't kiss, you didn't hug, you didn't hang out, you didn't spent time together and you didn't have sex.
You missed everything that a real boyfriend could get you but you were stuck. That's when Katsuki Bakugo entered your life. He started hitting on you at a bar you'd go to every thursday nights after classes. The first few weeks, you declined. Of course you did, you have a boyfriend. But then you discovered that your boyfriend had cheated on you MULTIPLE times. You didn't think twice and the next time you went to that bar, you hooked up with Katsuki.
Now y'all became friends with benefits while he's knows about your situation and keeps seeing other girls, and you stay in your toxic relationship. Truly, you both only find comfort in the arms of each other but none of you would admit that.
Katsuki on the other side, he's a real player. Always chasing after girls and being an ass about it too. Too much pride, too much ego but was it really too much. Though the guy was really incredible so, You didn't mind his attitude. You didn't know it but ever since you started hooking up, he started to see less and less girls until it fell to one, you. Without you knowing, You're the only girl he sleeps with now.
Right now, we're in bed together. You got your head leaned against his chest as well with your hand while he got one arm wrapped around your shoulder and his other behind his head. He was carressing your shoulder and you were relaxing.