
I'm not so interested in their past (but I still like the incest tho). From the very first chapter until now, I always think about the police who introgated Yoseob. I mean, Yoseob keep silent all the times, and he suddenly speak the truth (or the past) after "that person" came to view.
I guess Yoseob killed 8 people when he's 3rd year, and Jaeha already graduated. And the person who introgated Yoseob in prolog was Jaeha. Just guessing.

I think it was because the police guy ressembled Jaeha physically (at least, from what we can see, he has the same hairstyle and hair color).
BIJI ALEX IS BACK HUH???