Euuuuuh .... could you please explain how the author managed to foul the audience ? Am I the only person who thinks that the auther is just making things more fucked up just to make fucked up things ( know what I mean ? ) I feel like it became just a "Thirsty for views" type of senario . The more disgusting and uncomfortable it gets the more the manga gets attention so she just start fucking the stroy without a deep meaning ... I mean that's how I see it , Killing Stalking was waaay better in season 1 . Just saying
╮( ̄▽ ̄)╭
When someone draws a comic/manga 99% of the time they already have the whole story planned out (Unless they're unprofessional and just do it for fun). Sangwoo is a very gruesome character and thats how he was from the start, we're just seeing a little more into his mind in season 2 because season 1 was mainly supposed to be from Yoonbum's perspective.

Wait a silly second..
Did sangwoo have a thing for his mom which is why he killed his dad?
Also..
I used to think I understood Sangwoo but Yoongi is a god at creating unpredictable characters. I swear its a super power because you rarely see anyone in movies, fanfics, mangas, comics, manhuas, manwhas etc, that can actually fool the audience as well as Yoongi. I hope this isnt going to be her only story.