Ayako travels on a hot spring trip with her husband and son. Her husband, who had previously been consumed by work and neglected family time, reevaluated his priorities after suffering an injury, leading him to plan this trip. Their son, who had been withdrawn and avoiding school, gradually begins to show signs of improvement through spending time with the family. Ayako has noticed her son secretly masturbating with her underwear, but chooses to remain calm and watch silently, prioritizing the strengthening of family bonds. During the trip, the son, inspired by their growing connection, finally takes action—stepping forward into a new phase of his life.