One Piece Upgrade System

Bill, who traveled to the world of pirates, received an upgrade system and could become stronger endlessly. In order to become stronger quickly, he chose to join the navy, so there was another navy on the sea that made pirates frightened. He is the navy's most dazzling supernova and a general deeply loved by the people. "It is our duty to rebuild the glory of the Navy!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.