Shion, a young man who is unable to manifest his magical powers even after coming of age, is left in the care of a family that specializes in magical research.
After finally unleashing his potential during a terrible incident, he is taken under the wing of a skilled healer, Rui, who promises to teach him how to control his powers.
But to properly command magic, a man must have a profound knowledge about carnal matters.
Thus, Rui decides to go against her marriage vows and take Shion’s virginity, while teaching him how to properly pleasure a woman.
At least until he is able to control his magical powers, that is….