Chapter 1: This was, dare I say it, cute :P Something about aquariums gets to me too, I dunno, it just seems really fluffy and happy. Also, the kid at the beginning was a nice touch to start the story off well. Innocent blunt questions really get to the point quickly, haha, and it interested me to keep reading \o/ Overall, the piece was short but sweet, I could really feel how much Hyomin loved Soyeon just from the small moments of interaction, and I could tell how much she just /understands/ based on what she tells us in the exposition.

Only real criticism I have is the tense, sometimes you switch between past and present.