Bible Black La Noche de Walpurgis

There is a legend on campus of an underground room where magic rituals once took place. The room was supposedly sealed off after a human sacrifice was performed there. As the thirteenth anniversary of this grizzly event draws near, someone is plotting for history to repeat itself. Is it the sweet, beautiful class president, Shiraki? The kinky Saeki, whose obsessed with the occult? The innocent Imari? The well-endowed art professor, Miss Takashiro, or the sexy campus doctor, Miss Kitami?