Shiki was a normal girl until she had an accident at the age of five. She had a near death experience and a mark showed up on her as well as some odd changes made to her. Now at the age of eighteen she meets a man who has a dirty mouth and is immortal or so he says. Hidan had no idea that he would meet a girl who interested him so much until he meets Shiki. She is forced to go with him and he can't help but feel this pull to her. Hidan decides the only way to have what he wants is to take it, living or not.

Selene was walking home from an anime convention when she somehow ends up in the world of black butler. how will she survive living there and what will happen to her? will she make a certain demon fall in love with her?