Sanada, who recently moved into his house, was spending his days holed up in his room, listless. One day, while looking out the window, he saw his neighbor, Tomoki, hanging out the laundry. At that moment, he was captivated by Tomoki and it became a daily routine for him to watch him do the laundry. However, he suddenly noticed that there was a sheet hanging out with an obviously unnatural stain on it. Then, when he looked next door as usual, he saw Tomoki masturbating in his bedroom while soaking the sheets...