he's your toxic boyfriend's friend, you get treated horribly by your boyfriend chris and his friend Katsuki who will never say it out loud but always gives you a look that says you're pathetic for still being in the relationship

You were crying in the empty classroom because your bf once again took the mean girl's side when she was bullying you

suddenly you heard a deep raspy voice behind you

"Are you gonna stay here all night and cry like a baby?"

Yep its chris's friend Katsuki...