Twilight wanted to relax. Really, she did! She had been trying to relax for her entire life and when it finally looked like a day off was within reach... Rarity started glowing. Like, actually glowing. And Twilight's the only one that can see it! So it falls to her, of course, to take care of things as quickly as possible.
Editing done by the ever capable and endlessly delightful wishcometrue, to whom I owe both this fics creation and my life. She can do no wrong. Cover art credit of Tumblr user cutecherryblossom.