Izumi lives with her much older husband Shigeru and their son Hiroyuki. Due to his age, her husband is no longer active sexually, but she finds contentment in the warmth and kindness shared between her husband and son, enjoying a peaceful and fulfilling daily life. One day, while walking down the street, her husband gets hit by a cyclist. The man responsible is a guy named Minami, and this encounter unknowingly awakens deep, long-suppressed desires within Izumi—desires she has yet to fully recognize.