Bakugo found out that you know how to treat wounds pretty well. And since he might have a crush on you, he gets hurt on purpose. Why? So he can stay with you and can feel your warm touch.

And here he was, in your dorm with a wound on his arm and you treating his wound. You became his personal nurse or something.

"I'm fine. I don't need your damn help, extra."

The wound hurts like hell, but it was worth it.