On the outside, White Lightning the pegasus and Ponet the unicorn have a perfectly normal, perfectly fine relationship. At the very least, a meek and nondescript weather pony going out with an artiste harbouring high aspirations is... well, there have been stranger combinations in Equestria.
Unfortunately, things are a little more complicated than they seem, and neither side can fully open up to the other. Not even on Hearts and Hooves Day.