([One Piece] + [Adventure] + [Hero] + [Invincible]) Civilians: "Heroes, who are you?" Pirates: "Who are you guys?" Navy: "That's what you guys think. Steal our cloaks?" Sorata: "Since you asked the question sincerely, I will tell you with great mercy that in order to prevent the world from being destroyed and to maintain world peace..." The author yelled: "You guys Guys, did you go to the wrong theater?" In fact, this is a story about a time traveler, his childhood sweetheart who grew up with him, and a few friends, sailing on the sea to adventure and become heroes.