Pirates of rumba are a pirate group in the cartoon One Piece. A cowboy pirate group led by Captain Ban Biao Yankee from the West Sea, whose members are good at playing musical instruments, was annihilated by other pirate groups in the windless zone 50 years ago. The pirate flag is a horned skull. The name of the pirate ship is unknown, and the bow is shaped like a bull's head. The slogan is: Let the crying child smile through tears.

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Rabu, a giant island whale, originated in the West Sea and is the largest island whale in the world. Rab, a whale born in the West Sea, was bullied by all kinds of wild animals at sea until one day, he met a pirate group rumba who loved music. Since then, the little whale has relied on it, and it is always so safe and happy when it is with rumba pirates who like to sing.

One day, however, Lombardy pirates decided to venture into the big waterway. Because the big waterway was too dangerous, Lombardy pirates had to leave Bula in front of the mountain and let him wait there for a while-"We will meet again when we come back from traveling around the world."

Therefore, little Bula stayed here with tears in her eyes, waiting for the return of Lombardy pirates on this side of the red soil continent. After a long wait, he didn't wait for the appointed meeting. Rab can't wait to find the Lombard pirates. So it hit the red earth continent with its head, hoping to break it and embark on the road of finding friends.

Until Bula meets Luffy, Luffy and Bula duel, Bula has a new waiting target. "I'll fight you when we come back from traveling around the world!" Luffy told Bula to stop hurting herself, wait for herself quietly, and painted a straw hat and pirate flag on the whale's head.

This time, Luffy will never fail to live up to Bula's waiting. On the journey, Luffy miraculously met Brooke and let her join him. I believe that 50 years of fetters and promises will be realized soon.