The reason why Bum kept a bra....was it because he used to cross-dress? I went back to chapter one and at the bottom of the page you can see a girl looking at Sangwoo http://www.mangago.zone/read-manga/killing_stalking/mf/c001/ Maybe that was actually Bum.
You know, I think you're right! Otherwise why would they show her again at the computer?
I wonder what is this "star" Bravat was talking about...(〜 ̄△ ̄)〜
And also the Undertaker is so beautiful in that coloured page
The star might be the violet girl
Nope, Violet Is weak due his sacrifices. He is giving blood, not receiving it