Protagonist Vaito, who was reincarnated as a werewolf magician, becomes the Vice Commander of the Third Division of the Demon Lord's Army. Having captured a frontier trade city, he is in charge of controlling and protecting it. Formerly a human, now a monster, he understands the feelings of humans and the feelings of monsters as well.
Thanks to that he is considered as a great commander with both wisdom and courage by others but in reality, it is just one hardship after another: Making the violence-loving demons obey, doing something about the always complaining humans, today also he is working hard as the main leader of the demon army.