This is a story about a newly married Osana wife who is cuckolded by her roommate in a shared house. Sayaka is married to Tomoaki, whom she has longed for, and moves into an apartment. There, as a shared house, Tomoaki's friend also lives with her. Although she feels a little uneasy, Sayaka dreams of happy days with Tomoaki. One day, when her husband was away, her roommate took advantage of Sayaka's weakness and demanded her voluptuous body. Sayaka reluctantly allows him to use her body, but she feels guilty about her husband. However, the man's desire for Sayaka's body does not stop, whether he knows it or not. His demands escalate further...