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

Anoth, once a tyrannical ruler who overcame all opposition, seeks peace by reincarnating after centuries of war. Two thousand years later, he awakens to a weakened demon lineage and a fading magical system. Determined to restore his former status, he joins Demon King Academy, where his immense power cannot be measured by standard means. This leads to him being seen as an outcast by both staff and students. With the help of a single ally, Misha, Anoth begins to rise through the ranks of demon society.