"That's fine, you can go back to your own ship," Luffy dismissed easily. "But later on, when I become Pirate King, we're getting married!" The declaration held the kind of absolute finality that only Luffy could be capable of, and Law felt his jaw drop. NOW COMPLETE :D

In an alternate universe, forces conspired to put Ace, Sabo, and Luffy in the care of the Red Hair pirates as children. The Grand Line would never know what hit it.