Izumi lives with her husband Shigeru, who is apart from her 2017, and her son Hiroyuki. As Shigeru was old, there was no "marriage" at all, but living with a kind husband and son was a life full of happiness that could be overlooked even without this. One day... my husband, who was walking along the street, gets hit by a bicycle. At this time, Izumi didn't know that meeting the man on the bike... a man named Minami would awaken her desires as a woman who was sleeping inside her...