Kamishiro Rui is a second-year student at Kamiyama High School. He is a member of the musical show unit Wonderlands x Showtime. Rui is an easy-going genius. He's meticulous about making every show the best it can be, making use of his flair for technology and inventiveness.Rui and his friend and leader of the troupe, Tsukasa Tenma, decided to test a device that should clone people, but something went wrong and now the two Rui are exactly the same, and the device is broken.