Yuriko's son, born when she was a college student. Her son also became a teacher and got a job; he used this as an opportunity to start living alone and left his parents' home. Today is the first time in a long while that Yuriko is going on a hot spring trip with her son. While Yuriko is happy about her son's growth, she feels the end of her life as a woman and worries about her own life. She takes off her blouse and skirt, leaving her in underwear, and whispers to her son who is lying down… Seeing her son get an erection from seeing his mother naked, Yuriko still wants to be desired as a woman… In a small, quiet hot spring inn, the real mother and son indulge in forbidden pleasure.
