Sora and Kairi had made many promises over the years. Whether big or small, these promises were never broken. Their promise to keep their secret place hidden from others. Sora's promise to bring back Kairi's lucky charm. His promise to hurry back home to her after he had been called on by King Mickey once again. Their promise to always be together, even if they are far apart.
Laying under the stars, they promised to spend more nights this way, just the two of them. As they fell asleep in each others' arms, they dreamed of future promises to come.