Wife Etsuko, married to a department chief, lives a comfortable life with a home provided by her husband, lacking nothing materially. However, there remains one emotional wound: her husband has suffered from ED due to stress for the past five years, and despite numerous treatments and efforts, his condition shows no sign of improvement. Growing anxious that his younger wife might be having an affair with a man ten years her junior, he declares, "If she's going to be unfaithful anyway, I'll find someone for her myself!"—and takes action. This decision sets the stage for an entirely new relationship.