Waitt he's younger than mc????

Thas what im saying…

Didn’t they show that he went to the same school as mc and they were like classmates?

I just thought he was lying about his age :(

I think haewon was a year junior. They all hung out together but it's clearly mentioned him being a year younger than yoonwoo

It isn't clear since they didn't mention it but I'm pretty sure they were in juvie together, not school. They mentioned that both of them were in that juvie called new morning Juvenile centre or smthng like that and the guy who sheilded yoonwoo from that flower pot was heowoon the ml