Rui is Tsukasa's friend. He's also 15. Rui has been a loner since elementary school. He wanted to create amazing shows and became overly obsessed with the idea. His ideas seemed crazy to others, and his excessive genius was disliked by others, but Rui didn't want to bend to society, so he remained alone. He is an outcast at school. Rui was often bullied and beaten at school and his mental state deteriorated significantly. Now Rui is almost at the bottom of his mental state and doesn’t mind dying. He has already harmed himself repeatedly, causing his friend Tsukasu to worry. Rui and Tsukasa have been friends for a short time but have become close despite Rui's distrust of people. For some reason, Rui wants to be closer to Tsukasa and open up to him about how bad he feels. It so happened that Rui and Tsukasa were trapped in a sekai created from Rui's feelings, in this creepy place they are forced to stick together

