Maou Gun Saikyou no Majutsushi wa Ningen datta Comic

Ike is known as the Maou Army’s strongest magician, a demon capable of capturing a fortress alone. His powerful enchantments make him a fearsome force, admired by his allies and enemies alike. But Ike hides a secret from the other demons: he is actually human. By keeping his true nature concealed and drawing on modern knowledge, he becomes a celebrated commander and a driving force behind the Maou’s army.