Lessons in Lunar Etiquette
Lessons in Lunar Etiquette is a story written by TK Hoshikuzu. It ran in Issue 65 at http://s2b2.livejournal.com/348630.html, and is mirrored at http://www.shousetsubangbang.com/mirror/lessons-in-lunar-etiquette/.
Communication problems galore.
This is actually a slashed version of a short story that I read as a kid. The original was titled, "The Moon Maiden" from Shen of the Sea, a compilation of Chinese folktales and published in 1926. After finding the book again and doing a little research, it turns out the stories are 'Chinese-themed' and the author was an American dude who I'm pretty sure has never been to China. In any case, the story has stayed with me for a long time, because I'm a sucker for tragic but still happy romance stories.
And if anyone is wondering how they manage to have children, I imagine that Jun convinced Yueye to temporarily leave the moon and they scoop up and raise all the orphan children they can manage. Then maybe by rediscovering ancient technology from Yueye's people or by making another deal with the demonness, they get back. Or maybe they found no need to return and reclaimed Yueye's kingdom on Earth. Nevertheless, they live happily ever after.