The Izumis have been married for 27 years. Ryoko is a former nursery school teacher and now a full-time housewife, while Yasuo has worked as an engineer for a major general contractor. Despite their busy schedules, the couple have worked together to raise their children. Yasuo is three years away from retirement. Meanwhile, their eldest daughter Chie has a baby. It is the long-awaited first grandchild. Taking this opportunity to have a long-awaited discussion about their future lives, the couple went on a trip to a hot spring for the first time in a long time. As the middle-aged couple soaked in the hot spring, memories of their younger days came back to them, and they bonded passionately for the first time in a long time.