[ Anime XXX ] Bible Black 4

A mystical book was discovered in a secluded room at Minase High School by a high school girl named Mina. This man began to practise black magic, which had positive results for him and several of his associates. Minase was enthralled by the craft, but had no idea of the atrocities it would unleash. In the end, both the roots of the book and the Walpurgis episode, which occurred twelve years earlier, were explained. Minase is unable to emerge from the abyss that he has entered after coming to his senses.