After 2000 years has passed, the ruthless demon lord has just been reincarnated! But his aptitude at an academy for nurturing candidates for demon lords is, “inept”!?
Having the potential to destroy humans, elementals, and gods, after an extended period of countless wars and strife, Arnos the demon lord became sick and uninterested in all that and longed for a peaceful world, so he decided to reincarnate to the longer term .
However, what awaited him after his reincarnation may be a world too wont to peace that his descendants became too weak thanks to an enormous weakening in magical powers.