Responses
I think is a mix of that and the fact he (the big bro) already got resentful feelings before meeting the uke, towards the little bro…
He looks like a bit twisted already and got later on obsessed with uke, which was the last drop and all his crazyness came out
did his brother push him from behind the stairs and sent him to the hospital and made him have amnesia?? was the dark figure him? I know he's jealous his lover (won) is obsessed with his little brother (Jinha) but it seems justified to hate his batshit crazy brother cause sending him to the hospital because of jealousy is really vile I'm hooked with the story. and I don't want them to end together, Won needs to leave that family alone!