
Seungbae has his troubles but he doesn't have the fucked up mind of a troubled murderer. Sangwoo's been through some shit and Seungbae is trying to right some wrongs. That's what sets the two apart. Plus, Seungbae has a strong sense of justice which gets warped sometimes but that just makes him more relatable. Aren't we all pretty gray?
Lol. Having flashbacks of Death Note. It feels like I'm comparing L and Light.

right, thats what I found too . Sangwoo definitely has his own version of justice . The problem is that it is only relative to him , for example his family and mother . Also , he killed Bum's uncle because he had raped bum multiple times . Seungbae as well, is becoming more violent and threatening murder for similar things to sangwoo . Like "these people did wrong" or "they deserved it" . The only difference is that seungbae actually hasnt murdered someone yet or harmed someone extremely , but his attitude lies on the same line as sangwoo's .
You know what , thinking about this now . I think the difference between sangwoo/seungbae vs Bum is that they were all wronged and taken advantage of, hoewever bum never looked for revenge or ill wishes against the people who wronged him . The other two are toxic and want to make those people hurt as much as they did .

I definitely agree everyone is pretty gray . I think thats the overall point of the manga , to show the extreme sides . On the note of seungbae , he definitely is not a murderer but I think he's slowly reaching that point . Within the plot , the only difference between seungbae and sangwoo is that sangwoo was shown actually murdering people which gives the preset that he has a "murderer's brain" . If seungbae had that preset I think he'd seem more similar to sangwoo .
To see how much he's turning into Sangwoo , but at the same time he hasn't stepped over the line yet . It's like he had that one little something that is preventing him from becoming Sangwoo . Which im really interested what the author is going to do about that . On the other hand , Bum is totally different from them two . I wonder what the author meant in doing that .