Tbh I think Joonwoo might cut them both off because seeing his past bully and closest friend being together would probably slow down his character development in a negative way. Joonwoo has developed so much already, but this takes the cake. Idk why people are hating on joonwoo for his thought process. The way he's dealing with this is kinda normal. I mean what would you do if you had assholes beat you up and ruined you and your friends lives, only to find out that one of the assholes has been having a better life for it, not only to add to the wound the asshole is hamin's crush. So if he actually does cut them off then I wouldn't blame him, he would rather be alone and not suffer as bad if he's still close to hamin rather than try to separate them and hurt hamin.