Yuki Mamiya

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. ...

The "Torture Club" is an official after-school activity at the private school Saint Honesty Gakuen. Yuzuki has no idea about the club when she enrolls, and gets abducted by the club ...