Dissatisfied with an ordinary high school life, Akane Niimura decides to join the Futa Club. The organization consists solely of futanari—well-developed women with male genitals. The club's members spend their free time pursuing a single activity: indulging in as much sexual pleasure with each other as possible.

However, there is a major problem with Akane—she is a regular girl! Therefore she can only be admitted to the club as a "service specialist." Despite ending up with the subservient role of being a sex toy for the other members, Niimura is content with her position and resolves to fully enjoy the club's exciting activities.

Niimura Akane is a normal girl whose curiosity lead her to join the Futa Club as someone in charge of service duties.

The members of the Futanari Club travel to the Manra Valley hotsprings to research the local harvest festival for a school project. Things quickly get out of hand though, as the hotsprings act as an aphrodisiac...

The members of the Futa Club are cyber-attacked by Elen, a Japanese-American. So they have no choice but to enter a competition against Elen.

Coming up with four parts. Each part have their own story.

Futa Club! Physical Check-Up!: Futa club are about to start the 3rd Annual President Selection Phsyical Check-up. However this are stand out from common check-up. In process, Akane-san will measure length and width of penis, height of glans, and volume of cum. Time to commence the check-up!

Love and Penile Skin: Haruka having trouble to keep her dick under control. She decide to jerk off in back of school campus. Suddenly, she got caught by Sanjou-senpai whom she admired by most students. What happen after that?

A Certain Lady's Morning: Maid named Shino servicing Miss Yurie. Both have their own secret.

Decision! Yuuko-sensei: Fudou Nana are stop by the school infirmary office for physical check-up. But there are more than that.