Mio, who married a husband much older than her. She was able to quickly get along with her husband's stepson, Takuya, who was close in age. All that was left was to slowly become a real family over time. Just when she was thinking that, Takuya confesses that he loves her as a woman. As soon as she becomes aware of Takuya as a member of the opposite sex, her body begins to ache. To make matters worse, her husband leaves on a week-long business trip... Mio and Takuya, the distance between the two rapidly closes.