Since losing her husband, Ayano, a mother, has had feelings for her daughter Haruki that go beyond those of a child. Due to these special feelings, she peeks at her daughter masturbating. There, Ayano witnesses a scene that makes her realize that blood is thicker than water. It is the sight of her daughter masturbating while squirting a large amount of fluid, just like her. Ayano can no longer suppress her throbbing desire, and begins masturbating, squirting a large amount of fluid.