People are in pirates, but the system thinks they are in the Xihui world

Kyoya was chosen by the [One Piece Achievement System]. As long as he chose to become a Marine, Pirate, or Bounty Hunter, he would receive initial achievement rewards, step by step stirring up new waves in the One Piece World.

But...

"System, are you sure this is the One Piece World?"

Staring at Rangiku, who had just handed him a steamed bun, Kyoya's face darkened with frustration.

"I’ve been scammed by this unreliable system…"