
i thing Sangwoo doing that bad things to Bum because when he was young mby mother going out with sick bastard (mby he's father) and make him watch making sex with mother in the closet and used violence on him when he was young, Bum reminds him young him and he want break his mind and make him like him and stay together, kill together, enjoy together, just my guess

I hope she will due in next chap. And hope bum will run away from him and make sangwoo suffer a lot

Yea he should run away while he's got the chance instead of watching them have a go at IT

Sangwoo not love Bum but he starting feeling for him when he blushed, i think mby Sangwoo love to him bec he never treated other victims like him, that why he is not kill him till now i believe, thats why when he bring that girl and have sex (i think he will kill her), i think Sangwoo want Bum be jealous
Pls update
http://www.77mh.com/colist_235040.html
Thank you
thank u