Maou Gakuin no Futekigousha: Shijou Saikyou no Maou no Shiso, Tensei Shite Shison-tachi no Gakkou e Kayou

Anos, the Demon King of Tyranny, has defeated humans, spirits, and gods alike. But even demon kings get tired of all the fighting sometimes! Hoping for a more peaceful life, Anos decides to reincarnate himself. When he wakes two thousand years later, though, he finds the world has become too peaceful--his descendants have grown weak and magic is in serious decline. Intending to reclaim his rightfu...