At Walpurgis Magic Academy, where spirits possessing overwhelming magic and libido hold rule, the arrogant, beautiful spirit girls look down on humans, boasting, "There's no way a human man could ever satisfy us♡" Into this academy steps a transferred wizard. His sole weapon? An out-of-this-world, boundless stamina and sexual power that makes even spirits tremble! Using his overwhelming prowess, he teaches these proud, beautiful spirit girls lesson after lesson—?! The story begins in a chastity-reversed academy: an erotic fantasy harem conquest about putting cheeky, beautiful mesugaki in their place!!