During the summer vacation, Toshiki is left in charge of watching the house while his sister goes on a trip. The only thing that gives Toshiki peace of mind, as he is busy with his job search, is to spy on the private life of Eimi, the married woman who lives opposite. He can see everything, from cleaning, to changing clothes, to their lovemaking... One day, on the way home from his job hunt, Toshiki happens to see Eimi sitting down after spraining her ankle, and ends up taking care of her back home. Separated by a single window, Toshiki is able to get within a few centimeters of Eimi's body, and his growing desire explodes...