Kuroi Misa, a girl with Satanic powers, mysteriously appears in various high schools. Carrying a dagger and a heavy leather bag, she uses her powers to eliminate the evil forces that thrive on deadly sins of the human race. Her ultimate aim is to cleanse the earth and rebuild her broken family.

Juri swears revenge on her brother after deciding that he is responsible for the murder of their parents . . . but otherwise lives a normal and happy life. The action takes place in the Yokohama underworld as brother and sister are reunited . . . for battle!