The Otaki couple have been married for 40 years, a loving pair. After their son became independent and the husband retired, they spent their days in leisure. One day, to celebrate their 40th wedding anniversary, their son gave them a hot spring trip as a gift. Thinking back, since their son was born, they had never traveled together again. Unknowingly, the couple had become sexless, more like partners who had shared hardships rather than man and woman. During this hot spring trip, different from their daily routine, the two reunited.
