It was a bolt from the blue for Kishimoto Mami when her husband was involved in an accident and imprisoned. It was at this time that her husband's brother, Kiyoshi, showed up, and after forcibly embracing Mami, said he wanted to help her with her living expenses. Since then, their relationship has continued, but one day Kiyoshi said, "I'll introduce you to someone who can give me more money." The man's name was Sakakibara Norio. He lived with his wife Keiko and was an apparently wealthy man. "From now on, I'll be able to use your body as I please for a while.... OK?"