At 15 years old, Miu Sakurai attends a Catholic school and harbors strong feelings for Shion Amamiya. Despite her fervent prayers for his reciprocation, her affection remains unacknowledged. Desperate for a solution, Miu attempts to use a book of magic to win his heart. However, her spell goes awry when she unintentionally summons Satan himself. The demon is willing to grant her wish but at the cost of her virginity, an offer that Miu rejects. Now, she is faced with a dilemma known as a "virgin crisis." The work includes two additional stories, "Satanic Honey" and "Satanic Cohabitation."