After marrying Takeshi, Shiho moves in with him and his father, Mitsuru. Delighted to finally have a woman in their all-male household, Mitsuru welcomes his daughter-in-law warmly. One day, the severely nearsighted Shiho accidentally breaks her glasses. Soon afterward, she follows a noise into the bathroom, assumes her husband is bathing, and begins undressing—but the man inside is Mitsuru. Though initially stunned by the encounter, Mitsuru soon starts impersonating her husband and sexually exploiting Shiho's poor vision for his own pleasure...