Kaori, who was married to homeroom teacher Mineta in high school, became a sexless couple in the second year. My husband doesn't know my wife who repeats masturbation every night... One day, Kaori gets to know his neighbor, Sasano, who has just moved in. Sasano, who enjoys painting, chooses Kaori as a model for the painting contest exhibition. While hesitating for the first time, he exposes his naked body as he tells him...