One piece: A ten Year Difference.
In this fanfic Sabo, Ace, and Luna take Luffy who is ten years younger than then Ace and Sabo with them to the grand line where the meet none other than Whitebeard. Ace is kidnapped by Whitebeard so it is up to Luna, Sabo, and little Luffy to get him back or will they join the Whitebeard pirates. Ace and Sabo are twe...