Pirates: Invincible at the beginning

([One Piece] + [Adventure] + [Hero] + [Invincible]) Civilian: "Hero, who are you guys?" Pirate: "Who are you guys?" Navy: "That's what you guys want Do you want to snatch our cloak?" Sorata: "Since you have asked the question sincerely, I will tell you mercifully, in order to prevent the world from being destroyed, and to maintain world peace..." The author shouted: "You Guy, did you go to the wrong theater?" In fact, this is a story of a traveler, with his childhood sweetheart who grew up with him, and a few friends, sailing and adventuring on the sea and becoming a hero.