When Naoko was a freshman in high school she was kidnapped and imprisoned by a man who lived next door. For one month, she went through hell. Finally, she killed the man and escaped. Now as an adult, Naoko is a doctor specializing in infertility treatment, but she also has another side. Naoko is a popular master in a S&M club.

A legend covert soldier with a mysterious past now decides to once again unleash his beast inside of him to stand up for what he cares about.