Starlight makes a batch of love potion and Sunburst accidentally drinks it, but he seems unaffected, did she mess it up or could it mean something else?
The second changeling attack on Equestria has helped the Royal Crystaller Sunburst in getting a fresh perspective on several aspects of his life. One particular aspect comes into focus when Shining Armor and Cadance offer him a weekend off.
Starlight tries her hoof in writing poetry, and while Sunburst knows more about the genre than her, she thinks she would rather die than let him read it, since most of them are about him.
(Prequel to "Birthday Built For Two".) On a trip to the Crystal Empire, Starlight finds Sunburst acting rather strange. Before she has a chance to ask him though, she gets roped into helping him foalsit Flurry Heart for a day.
Quietly, Sunburst has pined for Twilight Sparkle. Though his feelings run deep, his words fail him. He knows love isn't his expertise, so to resolve things he goes to the best - the changelings.
When Starlight Glimmer reads A Hearth's Warming Tail for herself the day after Hearth's Warming, she finds it to be a bit different then how she remembered. Specifically, what was Sunburst doing in the story?
Starlight Glimmer destroys Equestria when she learns how she actually lost her soulmate, Sunburst. Fixing her mistake, she learns time travel can lead to a revelation of the heart and the renovation of harmony. (An alt-ending to The Cutie Re-mark.)
After the crystalling, the banquets, and the private after-party, Starlight gets her chance to be alone with Sunburst. They realize that they share two things in common: their friendship and different perspectives of the day he got his cutie mark.
(Sequel to "Starlight and Sunburst's Misadventures in Flurry Sitting". Takes place after "A Horse Shoe-In".) Trixie takes it upon herself to set up a date for Starlight and Sunburst, since the two haven't had one in a very long time.