I dont want Sangwoo to die. I want him to be jailed and repent on his sins

but this chapter just shows how fucked up in the head he has become, I doubt he'd repent even if he were jailed

I agree that he is so fucked up for him to be able to repent. Still hoping that he would change but if it will not happen, I wish that he survive.
I feel like him dying is an easy route, the best escape from his sin. I want him to suffer. I want him to suffer in jail. I prefer years of suffering in jail than quick suffering by a painful death.