The Matsumoto couple have been regularly trying to conceive since their marriage, but without success. They suspected there might be a problem with their bodies and visited a hospital together, but no direct cause was found. However, the doctor suggested that the issue might lie in the husband's sex life. Around that time, the neighborhood association chairman invited them to a meeting, where the wife, Riko, underwent humiliation under the guise of infertility treatment. The intense pleasure she couldn't get from her boring encounters with her husband began to affect Riko's heart and body…
