Three hopeless guys who work at the same convenience store regularly get together for drinks: virgin Takimoto, the manager; former rapper and alcoholic Hito; and a drifter who quit a corporate job to become a ninja performer, considered entering porn, and now works part-time. All three are habitual masturbators, and their usual gathering changes completely when their female coworker Hina Nitori unexpectedly joins them. She sets her sights on the trio and takes control of their orgasms for an unforgettable summer.