Jiro Hitotsubashi is a scholarship student at the private Ranman Academy who offers his penis and semen for the pervert course in exchange for various privileges.

However, he is still a virgin. He wants to be particular about his first partner. One day, as he continued to masturbate in frustration, Jiro was seen masturbating by Chihiro, the eldest daughter of the Maezono family who lived next door, and this led to everyone in the Maezono family finding out that he was still a virgin.

The Maezono family, consisting of five mothers and daughters, are famous for being a charismatic pervert family. There is no way they would leave a virgin lying around, and Jiro becomes a target for their perverted acts.

In this situation, the only thing you can do is do it before you get done.

Jiro decides to choose his first partner from among the five attractive women of the Maezono family, but ...