Cruel demon king revived after 2000 years of sleep...
But the aptitude for an academy of raising a demon king candidate is...《inappropriate》!?
The tyranny "Anos Voldigoad" has been reincarnated, wishing for a peaceful world, growing bored of the everlasting wars while destroying humans, spirits, and even the gods.
But 2000 years later, the world that stood, waiting for him after the reincarnation is the descendants who got super weak after being used to peace and several declined magic abilities.

Anos enters "Demon Academy" which gathers and educates the demon king candidates, but the academy could not know his true ability and recognizes him as an inappropriate one.
Moreover, the legendary demon king is being treated as a totally different person from whom he used to be.

In the environment where everyone around him treats him like an inferior, having Sasha, the only girl who is friendly to him, as his subordinate, the inappropriate one (demon king) runs up the ladder of demon race hierarchy once again!

"Whether it is a law, fate, or even a miracle, everything obeys and disappears from my eyesight."