A man who is so shy that he doesn't want to take off his mask in public confines JK's Ruru-chan. The man locks himself up in his house with a magic mirror and watches him earnestly. If it's here, she's safe and secure, and she won't be able to see it. Although Ruru-chan knows that nothing will be done, she is only allowed to take one-sided communication and she is gradually tormented by fear. She is so scared that she can only listen to what the man says, and she is gradually trained by him.