Manga

The Misfit of Demon King Academy: History's Strongest Demon King Reincarnates and Goes to School with His Descendants, or Maou Gakuin is written by Shuu (秋) and illustrated by Shizuma Yoshinori (しずまよしのり). This series tells the story of Arnos, the strongest demon king in history, and his attendants Sasha and Misha Necron, as he attends the Demon King Academy after his resurrection to reobtain what is rightfully his.

The Maou Gakuin manga is published by Square Enix Manga.

Synopsis
The Demon King of Tyranny who revived after 2000 yearsーーー

However, his aptitude at the academy that nurturing candidates for the demon king is ーー "Misfit"!?

Tired of endless conflicts, destroying humans, spirits, and even gods, Demon King of Tyranny Anos Voldigoad, who dreams of a peaceful world has decided to reincarnate. But 2000 years later, what was waiting for him to reincarnate are his descendants who get used to peace and became too weak, and magic is in serious decline.

Anos enrolls in the Demon King Academy, the academy that collects and educates those who are considered to be the reincarnated Demon King, but it failed to see his power and branded him as the Misfit. Furthermore, the legendary Demon King became completely different from himself.

While being underestimated by everyone, only a young girl Misha who is kind to him as his subordinate, the misfit (Demon King) runs up the demons' hierarchy!!