Manabu's parents, who are having trouble with their virgin son who can't study, decide to hire Shinobu, a rumored talented tutor. However, Manabu is drawn to Shinobu's mature body and finds it even harder to concentrate on his studies. "The most important thing is to become a grown man!" Shinobu understands Manabu's feelings and naturally begins to teach him about his perverted studies as well... Will Manabu be able to graduate from being a virgin?