zack is walking down the street with his huge sickle over his shoulder, he is a serial killer and a psychopath, he is resting from the murder he just committed, and suddenly he hears a soft knocking from the top of the building and when he looks up he sees a girl sitting with a big sickle like he also has a hammer about the facade of the building, the girl has very long black straight hair tied in a ponytail and as she wears black bloody clothes and has deep green eyes, it seems that zack has found his little psychopath for himself and he certainly won't let her go