
Me too, she wouldn't be killed that easy especially after the author has drawn a lot of back story about her..... Anyway I have just seen chapter 18 and.....
Yup she has discovered Bum, but we still don't know if she will die or not (although it looks like she would be but... it's Killing Stalking, we never know what's gonna happen) (⌒▽⌒)

Are we talking chapter 18 spoilers here or 17? Below is 18 spoilers.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
I'm even more sure now than ever that Jieun is gonna die and he wants Bum to do the killing. Using Google translate I translated the last speech bubble of 18 and it said "until the death". (Can't Google translate more atm because I'm in public and whatnot) I think if Bum refuses to kill her Sangwoo will do it himself. I can't see any way Jieun would not be killed. Sangwoo can't let her go now because she'd go to the police. I don't think Sangwoo is interested in keeping two captives either. He'd kill one and keep the one he likes more, which would be Bum. Jieun will fight it but she's not coming out alive.
SPOILER
Am I the only one who doesn't think Sangwoo is gonna kill her?? If that's the case, the plot would be wayyyy too obvious... And it would turn out to be quite lame too, since there has already been a scene where he and Bum killed 1 person ╮( ̄▽ ̄)╭
My prediction would be that she will live and either:
1. Discovers Bum living in SW's house
2. Leaves SW's house safely, while Bum at home getting all depressed and jealous
3. Sth goes beyond my imagination (which is likely to be the case lol)