Izumi lives with her older husband, Shigeru, and her son, Hiroyuki. Since Shigeru was old, "married life" was almost non-existent, but a life with a gentle husband and son was a life full of happiness. One day like that ... my husband who was walking on the road will be contacted by a bicycle. Izumi didn't know at this time that meeting the man who was riding the bicycle... Minami would awaken her dormant desires as a "woman"...