Maougun Saikyou no Majutsushi wa Ningen datta

A demon capturing magical is known as one of the strongest magicians of the Maou Army in Demond world. He can easily kill all of his enemies alone with his magical tricks. But he has a secret that he won’t reveal to anyone at any cat. He is a human in the demon world who became the strongest of all and commander of Maou’s Army.