"Once Upon a Time” Lasts Forever

Thank you for writing me a story for Yuletide! My biggest request is no tragedies, no darkness unless followed by light. I have a rough time emotionally when the days are short, and I think we could all use a little light and brightness these days. But, contrariwise, I am a definite believer in the idea that tensions or even pain make a sweet ending better, so go for salt caramel or even black licorice rather than cotton candy.

Have some optional details about what I like and don't like in a story.