The Fallen Brother Is Actually the Strongest: The Strongest Hero in History Is Reincarnated and Unknowingly Unmatched at the School

I, Eugene, am the strongest hero in history. After defeating the Demon King, I found myself reborn as Julius, the son of a nobleman. It seems that in this world, I was abandoned by my family as a child with zero magical power. I was compared to my excellent twin brother, cuckolded by my selfish fiancée, and looked down upon as incompetent by the people at school and in the mansion. It seems I had a rough life. But I, reincarnated as a different person, don’t care about them at all and decide to live my second life in a carefree manner. At that time, I did not know. That this world is actually the future, 2000 years after my time as the Hero. In this peaceful world, the level of magic ...