Under the care of a family specializing in magical research, Shion fails to manifest his magical powers even after reaching adulthood. However, during a terrifying incident, he finally reveals his talent and is taken in by an experienced healer named Rui, who promises to teach him how to control his abilities. In order to do so, Shion must possess deep knowledge in the realm of sex. Rui goes against her marriage vows and takes Shion’s virginity while teaching him how to satisfy women. This arrangement lasts until he learns how to control his magical powers. With Rui’s guidance, he begins to explore his sexuality and uncover the mysteries of his magical powers and begin to the journey to master magical power!.