The Sugiyama couple has been without sex for a year now as their husband Shigeru, who runs a large family business, has no use for his penis. Ayumi, a frustrated wife, indulges in masturbation with a toy she received. Osawa, a neighbor who happened to be delivering a circular, saw a shocking sight. The elegant and serious-looking wife's appearance is too vulgar. Osawa can't contain his excitement and attacks Ayumi. Despite being raped, the feeling of a cock for the first time in a while revives Ayumi's true nature...