Mei and Hosoda are childhood friends. Mei has long harbored feelings for Hosoda, but he is too dense to notice. After school, Hosoda and his friends are having a crude, sexually explicit conversation; they decide to buy an "onahole" (masturbation sleeve) for the group to try out. Mei happens to overhear this and urges them to stop, calling the idea vulgar and foolish. However, faced with their pushback, a thought occurs to her: for the sake of the boy she loves, perhaps *she* could become his onahole instead...