Bible Black

Link: http://torrentportal.com/details/1006137/%5BTS%5D+Bible+Black+Only.torrent

The whole series features frequent sex and horror scenes and revolves around a high school rumored to have been the base of operations of a coven several years ago (pre-2000). The school's unofficial "Witchcraft Club", as they called themselves, practiced black magic in the underground basement hidden away at the institute. Teachers, students, professors, and staff practicing the dark occult religion involving incantation sex and sacrifices of innocent victims is a common and recurring theme in all things Bible Black.

Japanese title was Bible Black Sidestory

Before the events of Bible Black, Takashiro and Kitami were still high school students. Takashiro starts the first Magic Club when she finds the book, Bible Black, in an antique bookstore. Her experimentation with its black magic powers escalates to include the whole school. Kitami, the pure virginal transfer student, is also caught up and corrupted by the ensuing debauchery.