One Piece Chapter 1.2, page 17: Romance Dawn (Version 2)

Luffy holds up his straw hat, spinning it on his finger with a smile. 'THIS HAT WAS ALWAYS WORN BY THAT VIOLENT GRANDPA. IT'S MY TREASURE.' Anne looks at him and smiles softly. Luffy asks, 'TREASURE...! MM-HMM. WHAT'S YOURS?' Anne replies proudly, 'BALLOON!' Suddenly, Luffy spots something out the porthole and points excitedly: 'HEY, LOOK! A WHALE!' Anne yells back, 'LISTEN!'