"No way, I was a normal housewife, and I'm having a good year with my younger brother ..." Aya Kurahashi (Ai Kano), an older sister in her late 30s who has two children, added 30 to her household budget. It was decided to undertake the housework for Takumi, the younger brother of a single aristocrat. However, Takumi, who was awakened to a mature woman fetish before he knew it, had a secret lust for Aya ... Takumi, who had a relationship with a drunken momentum, continued to seek her and proposed a divisive relationship. Aya's body is drowning in the joy that she wants to blame for the pleasure of having an affair for the first time, even though she says "for her household budget".