Unhappy with a mundane high school existence, Akane Niimura chooses to join the Futa Club. This group is made up entirely of futanari—women who are well-developed yet possess male genitalia. The members dedicate their leisure time to one specific pursuit: maximizing sexual pleasure with one another. Yet, Akane faces a significant issue: she is an ordinary girl. Consequently, she can only gain entry to the club as a "service specialist." Although she ends up in the subordinate role of serving as a sex toy for the other members, Niimura is satisfied with her status and determines to fully partake in the club's thrilling activities.