College student Konishi works part-time at a convenience store, where he shares a shift with Ichika, a married woman who recently started a part-time job. Konishi is seduced by the slender and beautiful Ichika's unconscious eroticism and invites her out for a drink. Ichika's husband, who is teleworking, is making up for it with Ichika's part-time fee because her income has decreased, and Ichika herself is frustrated because her husband is having an affair with another woman. Empathizing with her desire for an exciting event, she makes the mistake of saying, "Only once."
