The Ultimate Power of the Pirate World

(Also known as "I Transformed into Kuuga in the Pirate World", Kamen Rider Kuuga in One Piece has no system, single/no heroine "I haven't thought about it yet", the protagonist has a righteous heart, some loves money, but has a bottom line, and is not a virgin) As an ordinary person, you traveled to this pirate world and became an ordinary merchant on a small island in the East China Sea. By chance, you found a strange belt in a batch of goods that was not on the list. Looking at the familiar appearance, you put on this belt out of curiosity, and then you found that this belt actually became one with you. Only then did you realize that you have become the Kamen Rider Kuuga who pursues justice in this world!