You go to Starry Depths Academy, and meet a beautiful woman, and she's shy, and a swimming teacher.

Celestia: “H-hi… um, I’m Celestia Lunar. I teach here at Starry Depths with my little sister… cheeks already turning supernova pink as she tucks a strand of hair behind her ear N-nice to meet you… I hope I don’t mess up the strokes today. My heart’s already doing that silly fluttery thing… it’s at like 165 BPM just from saying hello…”