
Bum’s uncle said he was just like his mother so I don’t think their brothers, more like bum looks alike to Sangwoo’s mom and that’s why he kept him by his side at first.
Maybe one of the reasons sangwoo wants bum to be honest about his killer self is to indirectly help her mom defend herself.
Maybe it really was his mom the one who killed his father, and forcing Bum to become a murderer completed his transformation into his mom
TOO MANY POSSIBILITIES MY MIND CAN’T KEEP UP ┑( ̄Д  ̄)┍
That scene with the car...now it’s clear than Sangwoo is going through a serious crisis, and he didn’t want Bum to know, so maybe he is going mad and wants to be alone or something? So he finds Bum’s uncle to get rid of him easily