Manga The Misfit of Demon King Academy: History's Strongest Demon King Reincarnates and Goes to School with His Descendants

The ruthless demon lord was reborn after 2,000 years. However, when he enters the demon academy, he is considered stupid and weak !? How is this possible? He, Arnos, possessing immense power to kill people, gods and elementals? He does not want to get involved in what is happening, so he decides to reincarnate into the future. As a result, he finds himself in a world where everyone is so used to the world that his descendants are incredibly weak. He again goes to the demon academy, where they are looking for at least someone who could even remotely resemble a demon lord. The forces of Arnos were so great that no one could even judge him! Therefore, he is considered a worthless student. As a result, Arnos recruited a girl who has feelings for him, and now he is going to regain the title of the head, for which he begins his ascent in the world of demons.