Kanako lives with her husband who is a serious worker. One day when she was living a lonely life without a night life, her brother-in-law Shinichi decided to live with her until a room was decided due to a transfer. In fact, Shinichi had been aiming for Kanako for a long time. During the day when her brother isn't around, he binds Kanako up and commits it. At first she dislikes Kanako, but she finds herself immersed in the world of bondage.
