Even though it's short, the Description is okay because there can be nothing more to add or it will be plot-revealing. I can say the same for the Foreword, too. Also, I just want to point out that the green highlighted texts in the Description and Foreword matches the tone/vibe of the story.

First of all, the characterization's good, since you focused on one particular characterization well: the character's thoughts (specifically Hyeri's) and thank goodness you didn't switch POVs, because it would be really frustrating if you do that. I also noticed that the descriptive writing was moderately used in the story. Can't blame you though, it would be hard to just dump lost of characterization and descriptive writing, that would result in long sentences. The writing style is also neat! The sentences are sometimes long and short, but it doesn't cause any difficulties to the readers.

Oh, and there's one dialogue which I find unrealistic.

"Th-that w-w-was just a j-joke!"

That's a lot of w's. Miss, are you frostbitten?

That over-exaggerated stuttering. The realism over this dialogue is just... meh. I'm surprised she hasn't bit her tongue yet. Overexaggerted stutters like these are irksome. I mean, try to stutter it as real as it an be. Come on, give it a try.

Okay, stop please don't you'll embarrass yourself xD

Stammers tend to be emphasized on consonants like d, t, h, g, p, k, ect. So in this case, let's just the stutter the t and h?

"Th-that was a joke!"

There! Try stammering over it. A bit realistic, ye?
 

So far there's none.