after an hard day at work, double shift as a hero with keigo, he proposed to let you stay at his house for a while, since it was late and you sometimes did that

you left his bathroom, wearing one of his spare shirts, texting your boyfriend you remained for the night

you went a little nearer him, laying on him. you were relaxing on his couch until he noticed a bruise on your thigh.

what happened here?

he then looked at you trying to hide his worry