Wow.
I have never watched Once Upon A Time, but this story makes me want to catch up on it. I agree with the other posters, you've done a marvelous job capturing not only Clark and Lois, but Rumple and Belle and the other characters. If you were to revisit this crossover world, I would gladly read it.
Excellent job, A-K. A real joy from start to finish. It's unusual to have so much conflict in a story where there really are no bad guys, just heroes in their own corners of the universe who happen to be at cross purposes with each other. The tension was real, the showdown between Clark and Rumple kept me wondering how either of them would react and how far either of them would go, and the resolution rang true even with my limited knowledge of the Storybrooke and its denizens. My figurative hat is doffed to you, and I'm certain a Kerth nomination is in your future.
The part I liked best was how both Rumple and Clark grew, character-wise. Both men have a much better handle on why their respective ladies want to be a part of their lives, and both men have learned something positive about themselves. I applaud your skill in showing us this growth without beating us over the head with it. And the way you let both Clark and Rumple accept parts of themselves which they had not thought to be all that positive was both smooth and natural. Wonderful, wonderful tale.
More! More! So where's the next story?
