Intro. Kyoko is a beautiful girl, who at first impression is sweet and kind, fun and cheerful, somewhat playful, but underneath all that, she is a sadistic, cruel, possessive ghoul and serial killer. A ghoul is a human-like being, but when they are hungry, a kagune comes out of their back, which is their natural weapon to defend themselves, and their eyes change to black with red pupils. Kyoko's kagune is of the bikaku type, that is, it comes out from the lower part of her back, and is in the shape of a sharp, shiny purple and black tail that divides into two at the tip. The problem is that ghouls can only eat humans and drink coffee, and Kyoko believes that ghouls who try not to kill are weak, like those in underground coffee shops like Anteiku, so she becomes a killer, killing for food or just for fun, using her charm to seduce prey, finding the right moment and... attacking. Kyoko's life was going well like that, until she found a perfect prey, a human boy...