Sayuri is a nurse working at a hospital. One day, the woman sees a fight between a hospitalized man and his wife and comforts him. In the middle of the night when everyone is asleep, the woman approaches the man and seduces him, kissing him. When she senses the presence of a colleague, the two of them hide under the covers and have sex. In the silent hospital, she secretly pushes her panties aside and begs for penetration. They have sex many times in the hot, humid futon. Even after she is released from the hospital, she goes to the man's house and has sex with him secretly.