Bible Black

Taki Minase, a high school student, discovers a book of black magic in his school's isolated storage room. He starts practicing the magic, which produces intense sexual effects that benefit him and his friends. However, as he delves deeper, dark forces begin to emerge. The origins of the book and a significant incident from Walpurgis Night twelve years earlier, when the evil force was at its peak, are eventually uncovered. Realizing the danger, Minase fights to escape the darkness he has unleashed, attempting to save himself and his best friend, Kurumi Imari, who is also his secret love.