Trapped in modern day Tokyo, Sadao (who's Satan) and Emi (who's righteous hero Emila) slowly adjust to living as normal humans, and even maybe become friends. But discovering that Satan's former general, Lucifer, and a Church Order priest want to kill them, Satan, who temporarily can renew his magic, and Emila, who's carefully conserved her magic, become allies to stop them to protect innocent humans. Chiho, having discovering her co-worker Sadao's and Emi's true identities, isn't scared of them and still considers them her friends.
