As far as I remember, I think he tried.
He used to give him regular blow jobs when they couldn't pay the monthly interest or smth like that
he tried to r**ed him (ch 58), that was the only time it happened because as far as I can remember, it wasn’t mentioned if he was r**ed before
He did tried to rape yeon oh on chapter 26, but he didn't proceed, but gave yeon oh a lot of hickies & out of jealousy mr kwon raped yeon oh on chapter 28
my bad it’s on ch 26, ch 58 was when kwon r**ed him
Does someone remember if that shit ever raped Yeon-oh? I know he forced to give him head, but I don't remember if he ever raped him? I think yes? But I'm not sure. I'm asking this just based on that bastard's comments at the end