"No way, I, who used to be an ordinary housewife, have a relationship like this with my younger brother when I grow old..." Aya Kurahashi (Ai Kano), who is in her late 30s and has two children, is 30 years old to add to the family budget. It was decided to undertake the housework of Takumi, the younger brother of a bachelor aristocrat. However, Takumi, who had awakened to a fetish for mature women, has a secret desire for Aya. Takumi, who had a relationship with her through her drunken momentum, continued to seek her after that, and proposed a relationship with her. Even though she says "for her family budget", Aya's body drowns in guilty pleasure when she tastes the pleasure of adultery for the first time.
