Kamishiro Rui is a second-year student at Kamiyama High School.Rui Kamishiro is a frivolous genius. Because of his somewhat unique mindset, he is often referred to as an oddball. One day, as he himself believes, he realized a certain truth. The truth about God and his motives. He wished to share his knowledge and experience with others, and over time established his own sect. He hopes that his friend Tsukasa will support him and join. He believes that God does not forgive all sins.