Rio married Kazuyuki, the son of her former boss Shigeo. The relationship between the couple is still very good, and the three of them live happily under one roof. However, there is a secret that Rio cannot tell her husband: she married him just to be able to live with her father-in-law! Although Rio also likes Kazuyuki, the one she loves is actually her father-in-law. Due to their age difference, she has always suppressed her feelings and told herself that being close to him was enough. But the time she spent with her father-in-law has made Rio unable to control her emotions anymore; she wants him to love her as a woman...