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.Working and being friends with Tsukasa Tenma, he began to love him with an unhealthy love, and wants to be with him no matter what, even ready to kidnap him if necessary.