Ya, he did I've read the raws and where in a flashback in middle school explaining what happened to him, and its worse than you think.
Bro please spoil it for me
Say less. (Spoilers)
So basically what happens is that in Middle School Junghyuk of gets tired of having to always protect Yeonwoo and because of this he ends up just ditching yeonwoo and yeonwoo is like oh well I lcan understand why he doesn't want to be friends with me so he finds a new friend and he makes new friends. this shows you that before the bullying he was actually a somewhat social person. then the bully comes... Because of Yeonwoo's feminine looks he's basically a target for this bullying because they go to an all-boys School. Basically this is the start of yeonwoo being sexually harassed and assaulted because of the fact that he looks like a girl. It gets worse I'm not going to go into any specific detail cuz you're going to have to read this for yourself to find out. ♪ (^ω^ )
HELL NAW DID THIS BITCH SEXUALLY HARASS YEONWOO??? AINT NO WAYY IMA BUST HIS LEGS INSTEAD WHAT THE FUCK.
side note: WHAT THE FUCK BROOO