"You're too serious... you have to be a little conscious of women, like wearing sexy lingerie and asking your husband," Mika (Oshima Yuka) couldn't hide her upset when the married woman next door casually muttered. Then, in the afternoon after finishing housework, Mika picks up her obscene underwear that she normally never wears and secretly tries it on in front of the mirror, and remembers herself as a woman rather than a wife for the first time in a while. However, her husband's friend accidentally spotted this.