Reiko, who lost her husband in a car accident 10 years ago, raised her son Tatsuya to adulthood with just one woman. After a break from raising my child, I met a man named Fujimura through a friend's introduction. Reiko was attracted to Fujimura, who was sincere and kind. Reiko, who began to think about remarriage, invited Tatsuya to go on a hot spring trip to Yamanashi, where Fujimura is.