In the afternoon, housewife Junko seeks a little excitement in her dull daily routine. When a salesman unexpectedly arrives at her door, she playfully decides to engage him. A sign at the entrance reads: "Those aged 30 and above, please go to the bathroom; those aged 40 and above, kindly leave." As the salesman enters, surprised by the message, he finds Junko standing there, fresh out of the shower. This small twist in her ordinary life begins to pull her deeper into temptation.