Manga by author Anajiro

"Maou Army's strongest magician" I'm called. Ike, a demon capable of capturing a fort alone. Clearing away enemies with immense magic, he is without a doubt a monster awed by friend and foe. However he has a secret he can't tell other demons. "I, actually I'm human you know." Using modern knowledge to keep his secret, he became treated as a great commander and the driving force of the Maou's army.

Three years ago, a high school boy who had been the subject of relentless bullying carried out a suicide bombing that killed all but seven of his classmates. Now the survivors have gathered to finally put an end to their own torment.