Before getting a job in Tokyo, Koichi comes to Momo Reio and her two on a hot spring trip. Reo's husband refuses a family trip because he is busy with work. In fact, my husband is having an affair. Reio is worried about this alone. When Koichi sees his mother's depressed expression, he gradually becomes aware of her as the opposite sex. Koichi sways between the bond between the parent and child and the emotions of the man and woman, and seeks Reio.
