SECOND REVISON: This should be my last revision of the opening three for a couple of days at least. Tentative Title: ALTERATION. Genre: Fantasy. Word Count: 3000-6000 words.
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When the orange fireballs lit the evening sky, Hwang Seung-Ah stirred. She crept down the tree away from her mother and siblings, and watched the other tigers cower in the branches. The dragons that belched the bright goblets of flame from North Han would never deliberately hit South Han, but her people didn’t like the explosive thunderclaps when the dragon breath struck the oceans surrounding the divided country.
I love the names of your various characters, and this one is no exception.
Good opening. Quite visual without being overly "cinematic." I agree with the criticism of sentence three, although I didn't find it as offensive. Thought on sentence two: if she "crept down" to watch the other tigers cower, then I would write it as "to watch" and not "and watched."
I'd read more.