The Misfit of Demon King Academy (2020)

Anos Voldigord, a once-feared Demon King known for annihilating humans, spirits, and gods, grows weary of endless conflict and reincarnates, hoping for a tranquil existence. However, after 2000 years, he finds a world where his descendants have weakened due to prolonged peace, and magic has significantly declined. Anos enrolls in the Demon King Academy, intended for those believed to be his reincarnations. Unfortunately, the academy fails to recognize his immense abilities, labeling him as a misfit. Undeterred, Anos sets out to reclaim his legacy and challenge the new order.