Reiko was pressured into marrying a coworker, but their sex life ended long ago while her husband began visiting brothels. Her mother-in-law makes matters worse by declaring that a wife who cannot provide a grandchild is worthless. Driven to the edge and reduced to satisfying herself with her fingers, Reiko discovers by chance how to solve her problems. The demure wife begins chasing raw pleasure and climaxes on other men's bare cocks in her home breeding brothel.