Shiho marries her husband, Takeshi, and now lives with her father-in-law, Mitsuru. Mitsuru warmly welcomes Shiho, saying that her male-only household has flourished. One day, Shiho, who is extremely nearsighted, accidentally breaks her glasses. Immediately after that, Shiho goes to the bathroom after hearing a noise coming from somewhere, thinking that her husband is taking a bath, and begins to take off her clothes, but it turns out that it is Mitsuru... sudden