Nine years ago, she was assigned to the NSI as a special investigator and went undercover as a doctor to a hospital suspected of conducting unapproved genetic modification experiments. There she found Tsujimaru, who should have died the year before. She moves to identify her, but she is caught by the Joken, she undergoes an impossible pleasure torture, she becomes a cripple and loses her memory. She then changed her name and started her new life in the United States. However, her forgotten memories of her detestable girlfriend gradually revived, and for some reason she returns to Japan's NSI...
