Bible Black: La Noche de Walpurgis  

Bible Black: Night of the Walpulgiss, Bible Black -La Noche de Walpurgis-

A student named Minase discovered a book about magic in an isolated room at school. The book contained spells with sexual effects that were beneficial for him and some friends. As he became more interested in black magic, he didn't realize the harm it could cause. Eventually, the source of the book was revealed, along with the fact that it had been used on Walpurgis Night, when evil power is strongest. After realizing his mistake, Minase struggled to break free from the darkness he had created.