Satoru, a son, ends up sleeping with his mother Kumi, who has nowhere to sleep due to a serious fight between the couple. Her large, swollen breasts, her plump lips that remind him of her genitals, her scent of shampoo, soap and a woman... Satoru is excited by the sight of his mother asleep for the first time in a long time, and he can no longer suppress the desire that wells up within him. Satoru goes all out, sucking on his mother's breasts like an animal in heat. Kumi resists at first, but gradually she begins to feel it...