ay, Marino Hanamura receives an urgent request for assistance from Amaterasu Girls' Academy, where countless students and staff members are being mysteriously drained of mana in a suspected act of magic terrorism. Fortunately, Marino knows the perfect person to resolve the incident: Kousuke Takioto. Utilizing a secret angelic technique, Kousuke fuses with Nanami to become a female student and transfers to Amaterasu. But when the events of the game's scenario start to veer off script in a dungeon, will Kousuke be able to course correct and keep everyone alive?