Sato lives with his mother in a single-parent household. In the midst of puberty, Sato begins to think of his mother, Ayano, as a woman. Whenever he cleans, he catches a glimpse of her chest. He can't take it anymore. At that moment, he peeks at Ayano masturbating. His cock instantly becomes erect at the sight of her lewd, unimaginable behavior, and Sato loses his senses and attacks her. "Stop it!"Ayano cries and begs him as he continues to thrust into her, no matter how many times she cums.