Responses
I don't think he will kill Bum, but that's just my speculation for the moment. Another point is that we don't actually know how the mother died, only the resulting trauma she had on her son. Maybe Sang-woo never killed her, maybe she took her own life?
How come i see you post on every popular yaoi forum lmao
The way things are going, Sangwoo is probably going to misinterpret Bum's intentions and end up either killing him or hurting him really badly because of his trauma with his mom.
Everything Bum does in the story is paralleled with Sangwoo's mom's own actions so I can see Sangwoo thinking Bum is trying to kill him with the rat poison and even cheating on him with the one girl (much like his mom cheated on his dad).
If he does end up hurting/killing Bum though, he will probably find the gift he bought for them afterwards and feel guilty for everything. These two need a lot of mental help tbh Dude hallucinating at this point. It's only a matter of time before things go wrong one way or another.