Yuki's son, Yuki, feels his heart pounding at the reunion with his mother's friend, Saiharu, who came to stay for work. At night, I passed out while looking at his mother and Saiharu, and when I woke up in the middle of the night... In her bedroom, Saiharu, who was frustrated with her alcohol, could not sleep, and she accidentally witnessed her indulging in masturbation. In her awkward atmosphere, Yuki can't control her excitement and hugs her unintentionally... Saiharu accepts his pushy approach, but she acts like nothing happened the next morning. However, Yuki, who cannot forget the pleasure he once tasted...
