Son Yuki is thrilled to be reunited with his mother's friend, Ayaharu, who came to stay with her for work. - At night, I passed out drunk while looking at my mother and Ayaharu, and when I woke up in the middle of the night... - He happens to witness Ayaharu, who is in a state of agony due to alcohol, unable to sleep and masturbating in her bedroom. - In the awkward atmosphere, Yuki can't contain his excitement and hugs her... - Saiharu accepts his forceful approach, but the next morning she acts as if nothing happened. - However, Yuki can't forget the pleasure he once experienced...