At the center of the story is the ruthless demon lord Anos, who, after two hundred years since his death, is reincarnated and discovers that magic has significantly diminished in the world. His descendants are now much weaker and rarely use their magical abilities. This situation does not sit well with the demon lord. He intends to reclaim his lost titles and privileges. However, before that, Anos must receive an education at the Demon Academy, where he unexpectedly earns a reputation as a complete failure.