I do very much like this story. It does answer the question you have about Naminé and the promise and why she left (Sorta).

I love how RIku is so determined to open the door. And how Sora's crying. I do love your work.

Brilliant at the end. How it goes back to the promise of the two boys, even if it were fake. You should have ended it with Naminé drawing them at the cave. Or something like that.

Too cute! And it fits right into one of my wall categories