Ryoko lives with her husband in a rented apartment. One day, she loses her keys on the way home from shopping and ends up waiting at her neighbor Sayama's house. Sayama is attracted to the beautiful Ryoko, who has been single since his wife ran away, and he pushes her down. Ryoko is afraid and cannot tell her husband that she was raped by her neighbor. However, Sayama, who knows nothing about it, comes to their house and plays with Ryoko's body again. Ryoko's body is drawn to Sayama, who is forceful and stimulating, despite her Kokoro.