Des：A man who is so shy that he doesnt want to take off his mask in public imprisons high school girl Ruru-chan. The man locks her up in his house, which has a one-way mirror, and watches him intently. Here, shell be safe and secure, and she wont be able to see you. Although Ruru-chan knew that nothing would be done, she was only allowed to communicate one-sidedly, and she became increasingly frightened. She is so scared that she can only listen to what the man says, and she is gradually trained by the man.