Once a war between humans and demons ravaged the land, prompting Demon King Anos Voldigoad to sacrifice himself for peace. Reincarnated after two thousand years, Anos finds a world where magic dwindles and his legacy tarnished. Enrolling in the Demon King Academy, he confronts a distorted perception of his identity, facing a challenge to reclaim his true name and reign. Branded an anomaly, Anos embarks on a quest to unveil the forces manipulating history and restore his rightful place as the long-awaited ruler.