Shindara, who recently moved in, was locked up in his room and spent every day aimlessly. One day, while looking out the window, he saw the neighbor, Yuki, hanging up laundry. He became fascinated by her at that moment, and watching her do laundry became his daily routine. But suddenly, he noticed that there was a clearly unnatural stain on the laundry, and when he looked at the neighbor as usual, he saw Yuki masturbating while wetting the sheets in the bedroom...