Return of the Absolute Champion

Story:

“I am the omnipotent ‘Absolute Champion.'” Since the dawn of time, the Calamity Demon has appeared every 300 years, threatening humanity. In that world, Liam Hill, a member of the Hundred Man Squad, an organization of chosen reincarnated beings, challenges the Calamity Demon as the absolute champion with the power of 108. However, Liam is betrayed by his comrades and loses all his powers. He is cursed with immortality, preventing reincarnation, and sealed away along with the Calamity Demon. 1,200 years later, Liam is guided by a mysterious voice to reincarnate into the body of a bullied student at a certain magic school. However, the world has passed down a false history that portrays Liam Hill as a rare villain, and reincarnated traitors are secretly operating within the school…! The revenge tale of the strongest anti-hero, starting from the bottom, begins here!