The Pirate's Ultimate Swordsman, One Man is the Royal Group

Arthur travels through the world of One Piece. With a physique that can withstand beatings, he went from being the strongest genius in the history of the navy to a prisoner framed by the conspiracy of the Warring States. Twenty years ago, he wandered between various forces, avoiding the pursuit of the navy and the assassination of the Celestial Dragons. He was a member of the Roger Pirates. At the age of 16, his swordsmanship was on par with Rayleigh, and at the age of 18, his swordsmanship was on par with Roger... After Roger surrendered, Arthur, who had no background and no identity, was hunted down by the World Government and the Navy. This caused him to suffer from life-and-death battles since the beginning of the Great Pirate Era. It was once rumored that in order to save his eagle, he single-handedly went to Beehive Island... (Summarize all the previous experiences and write a serious...