Sayaka is a mother who runs a bar and is raising her only daughter, Miu. One day, a regular customer at the convenience store tells her that Miu has shoplifted. Sayaka rushes to the convenience store and apologizes profusely, but her daughter is told to go home and ends up talking alone with the store manager, Horiuchi. Horiuchi doesn't miss the sight of Sayaka's sweaty cleavage as she bows her head. He demands that her mother show him the benefit of covering up the shoplifting, and Sayaka decides to make the deal with her body...