I've just read this manga today and, oh yeah, I think it's awesome. It's just outstanding and has some thrill and intellectual part in it. But IMO it's gonna end in 2-5 chapters unless Hajima is found out to be the master of the entire game :lol:
Seriously I have 3 possible wolves: Eiji, Mitsuki & Rei. Rei is #1 suspect for me. She wasn't all that dead I think... It'd be too light for her part in the story. Anyway next chapter will show us everything (maybe) =)