At an ordinary high school, the teachers and staff are practicing a dark religion. By devoting their bodies to perversion and chanting dark spells, they control the lusts of the student body.

Everywhere the students turn, they are drawn to acts of perversion, even in public. The cult is run by the school nurse, Kitami Reika. Looking for a virgin girl to serve as a vessel for her own reincarnation, she holds special counseling sessions for the female students.

Before Kitami, the magic club was run by the art teacher Hiroko Takashiro. When she was a student alongside Kitami, she found the Bible Black. It was Kitami, however, who used the book to pervert the students and teachers as her followers, from which the current events are set into motion. Taki Minase, a student of the school, discovers the book, but is seduced by Kaori Saeki, the head of the Magic Club, and then is possessed by a lesser demon. Following this, Kitami takes over the Magic Club through magical subversion.

Kitami then pursues Kurumi Imari, a girl who is Minase\'s neighbor and childhood friend. Minase must either help Kitami to pervert Imari with a ritual orgy...