Top 9 in Top 10 Best Reincarnated Isekai Anime Movies Adapted from Novels.
Demon King Academy
Demon King Academy is adapted from the novel of the same name that is very well known in Japan. It has been 2000 years, the ruthless demon lord has been reborn! But his aptitude at an academy for nurturing candidates for demon lords is, "unsuccessful"?
Capable of destroying humans, elements and gods, after a long time through countless wars and conflicts, the demon lord Aos became sick and tired of all that and longed for a peaceful world, so he decided to reincarnate to the future. However, what awaits him after his rebirth is a world so accustomed to peace that his descendants become so weak due to waning magical powers.