Des:``I never expected that I, who used to be an ordinary housewife, would grow up and have a relationship like this with my younger brother... Kurahashi Aya (Kano Ai), an older sister in her late 30s with two children, is in her 30s to make ends meet. He is contracted to take care of the housework for Takumi, the younger brother of a single aristocrat. However, before he knew it, Takumi had awakened to a mature woman fetish and had a secret desire for Aya... Takumi, who ended up having a relationship with her while she was drunk, continues to seek her out and proposes a relationship with her. Even though she says its for her familys finances, Ayas body drowns in guilty pleasure as she experiences the pleasure of having an affair for the first time...