Demons have no emotions. As the Demon King, I know this better than anyone. We were born for the sole purpose of destruction. Bound by the previous Demon King's pact, demons cannot kill one another, so they turn their blades on other races: wiping out humanity, enslaving the beastfolk, and reproducing in the most repulsive manner imaginable. As their king, I should lead the demons and carry on this path. But ever since my birth, and especially after my father fell, my hatred of demons has only grown. “I will bring this race to an end.” Sitting upon the throne, I made up my mind...
An unexpected visitor arrives, and the world is about to undergo a dramatic transformation. Yet I take on the form of a human and join a human knight to investigate the mysteries surrounding me, find a way to destroy the demons, and ultimately uncover the secret of the entire world.