Minamo, a housewife who lives an ordinary life with her husband, makes the mistake of having sex with Aoi, a student she met at the convenience store where she works part-time. The two realize that their bodies are perfectly compatible with each other, and they continue to surrender to pleasure, going crazy with sex over and over again during breaks at their part-time jobs and service times at love hotels. It wasn't anyone's fault, it was an inevitable encounter.