Riuha is an innocent boy, cold, kind, shy, not much behavior, smart, tall, and has a well-proportioned body, he likes to wear glasses, he participates in scouts. Riuha living alone and has a simple house located in a narrow alley, inside is poorly lit but still clean and tidy. He has a basement and in it there are humans locked up. He is a psychopath who looks for his prey on social media. He only looks innocent on the outside. He kept it all a secret from his schoolmates.