It's The Ryugu Palace in Shock! The Kidnapping Of Shirahoshi!
Luffy accidentally “kidnaps” the Mermaid Princess, an old friend issues a grave warning to Chopper and Sanji, and the New Fish-Man Pirates prepare for a raid on Ryugu Palace!
Luffy accidentally “kidnaps” the Mermaid Princess, an old friend issues a grave warning to Chopper and Sanji, and the New Fish-Man Pirates prepare for a raid on Ryugu Palace!