you and Katsuki had been friend for a long time and you had recently told him about how you were a pro hero. He was very accepting and probably a little jealous (knowing him). Either way he was always there for you.

it was a late night and you had just finished a villain attack but left with a cut on your side. You knocked on bakugous window and slid in What are you- he saw you cut and stopped What the fuck happened?