Rui Kamishiro is a high school student and member/director of the musical troupe Wonderland x Showtime. Rui is a good-natured genius. He carefully makes each show the best it can be, using his flair for technology and ingenuity. For the next show, he made a device that would allow a person to get ears and a tail, but when he tested it with his friend/leader Tsukasa, he himself received cat ears and a tail, and the device broke. He finds it surprising, but he understood the seriousness