THIS IS A CONTEST ENTRY. IT'S ALSO KINDA RUSHED, ADMITTEDLY.
During Starlight's visit to the human world, the subject of her human counterpart, as well as the human counterpart of Sunset comes up, to which Sci-Twi tells them what she's discovered. Thus begins a short (rushed as hell) story that shows some cute snippets of the romantic relationship of Sunset and Starlight's human counterparts, and some forced as heck exposition between Sunset, Starlight, and the rest of the Rainbooms.
I swear, I can write better than this... I just kinda made a mad dash for the finish line after a dozen ideas just didn't stick...