I am not defending sangwoo we all know what he was and the author didnt try to redeem his character to forgive all of gis insane activities. He got what was coming for him, death. This evil maniac jukyung or whatever his name is gonna get Dan back coz of his sob story and i am not okay with that. The author can do whatever they want but this is my opinion. He's a blag flag
He is NOT a black flag. If you dont like this manwha then drop it. Its clear you only read manwhas for just for fun and actually dont wrap your head towards the meaning. I recommend something like "a shoulder to cry on" if you can't handle these cause your statement makes no sense at all but hey... we all got our own opinions whether or not it's true (^_^).. Still hoping this is ragebait,

If he sincerely apologizes then things might be better. Also the things he did in the past were horrendous and I dont care if he had a traumatic childhood, it doesn't justify what he did. He is more evil than Sangwoo