After 27 years of marriage, the Yuki couple have weathered the long journey of life together. Wife Rei works at a beauty salon, while husband Yoichi, a busy financial bureaucrat, is approaching retirement with only five years remaining. They have raised their children through mutual support, always cherishing their family. Their eldest daughter recently gave birth to a child while still in school, bringing the couple their long-awaited first grandchild. To celebrate this joyous occasion, they embark on a hot spring trip together, reuniting after a long time alone. As they reflect on the future, the passion between this mature couple begins to reawaken.