Yumihara is an elite businessman living a peaceful life with his son. One day, Yamada, a nursery school teacher, passionately confesses his love to him, saying, "Please marry me!" At first, Yumihara brushes it off as a joke, but it seems Yamada is serious. Yamada is cheerful, kind, and younger than him, but he is devoted. However, having experienced a divorce, Yumihara is still not proactive in love. Even so, he harbors some elusive, sweet feelings for Yamada during his time with him...