They aren't the only characters in the story, it's neat to see how each character is taking the situation that had happened in the previous season. Like a role reversal kind of, Yoonbum and Sangwoo are acting weirdly semi normal (I mean Sangwoo did kill Yoonbum's uncle and maybe that lady that looked like his mom, but this is why I say semi normal, as in he hasn't beat bum yet) and Seungbae is the one who's starting to go mad due to the loss of his job and being haunted by Sangwoo. If you're really reading this story for just the yaoi you should stop, this isn't focused on that, it's a psychopath showdown to see at the end who ends up killing and stalking.

I'm bored with this mahnwa