Shiho has married her husband Takeshi and is living with her father-in-law Shiho. Mitsuru warmly welcomes Shiho, thinking that his all-male household has become a little more glamorous. One day, Shiho, who is extremely nearsighted, accidentally breaks her glasses. Immediately afterwards, Shiho is drawn to a noise she hears from somewhere and goes to the bathroom, where she assumes her husband is taking a bath and starts to take off her clothes, only to find that it is Mitsuru who is there... Mitsuru is unable to hide his surprise at this sudden turn of events, but from that day on, he begins to pretend to be Shiho's husband and play with her body...