Kamishiro Rui is a second-year student at Kamiyama High School. He is a member of the musical show unit Wonderlands x Showtime.Nene's neighbor and childhood friend, Rui is an easy-going genius.He even builds robots to use on stage. His somewhat unique way of thinking often gets him labeled as a weirdo.In the course of an unsuccessful invention, he turned himself into a girl and was looking for a way to fix it, but his friend Tsukasa Tenma was the first to find out his secret.