Miki ends up watching her son's friend Kousuke, who came to stay at her house, masturbate. Miki, tickled by her shy Kosuke's naughty spirit, seduces him by accompanying him to dinner, but... Kousuke's unparalleled dick, which cannot be satisfied with just one ejaculation, devours Miki's body over and over again and ejaculates repeatedly... After that day, she continues to have a physical relationship with Kousuke, who visits her house many times, but Miki's body finally begins to scream due to his unparalleled loveliness...