Satoshi lives with her mother in a single-mother family. Satoshi, who was in the middle of adolescence, began to be aware of her mother, Ayano, as a woman. The chest that looks flickering every time you clean it. I can't stand it anymore. At that time, I peek into Ayano's masturbation. Satoshi who loses reason and attacks Satoshi who immediately erects a meat stick to an unimaginable unpleasant foolery. "Stop it anymore!" Ayano cries and begs for a fierce pursuit piston that does not end no matter how many times it gets caught.