People in One Piece, Sign in from the Sky Island

Traveling to the world of One Piece, Roy turns on the sign-in system. By signing in every day, he can easily improve his strength and become the Pirate King! From then on, the protagonist went to one check-in location after another: Sky Island, Rogge Town, Fish-Man Island, Navy Headquarters, Holy Land Maria Joe... What he got was one god-level reward after another that shook the world: the top six naval styles, three-color domineering, great swordsman swordsmanship... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.