Brad Lester, once renowned as the strongest mage, vanished from the public eye after the tragic death of his young daughter. While living a quiet life as a lowly day laborer, his beloved wife is murdered by the "World Peace Promotion Association," an organization seeking his power. Driven by a despairing rage after losing everything, Brad sets out for revenge—only to find Valburga, the leader of the Association, has been transformed into a little girl!? Furthermore, she has lost her memories and has nowhere to go. Haunted by the memories of his late daughter, Brad resolves to "help his arch-nemesis regain her memories." Visiting the Olford Ancient Magic Research Institute, the mouse-worshipping town of Brooke, and the blizzard-shrouded village of Lutz, their long journey across the land begins—. An adventure fantasy of the strongest mage and his "child" companion!!

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!