Mr. and Mrs. Kanda have been married for 40 years. His wife, Ruriko, is a full-time housewife, and her husband, Hiroaki, is a prefectural office employee. Meanwhile, the eldest daughter had a child. The long-awaited first grandson. Taking this opportunity, Hiroaki quit his job to spend the couple's time slowly, and while taking care of his grandchildren as a couple, he went on a hot spring trip for the first time in a while. After taking a family bath on a hot spring trip for the first time in a long time, the two confirmed their love that had lasted for 40 years.