Derpy Hooves, the mail mare of Ponyville. The only mail mare of Ponyville, to be exact. She know every letter and package that is sent, and she know who gets a lot of mail, and who doesn't get anyhing at all.
Rarity seldom gets any mail, and now, somepony is sending her love letters. Somepony who doesn't give out their name.
Derpy follows the affair at a safe distance, hoping that one day, the anonymous pony and Rarity will find each other.
And until that day, Derpy will do her delivery route, as she does every day, sunshine or rain.
Just a quick sweet thing, written in like one hour. Not edited.
Cover pic by RavingSpectrum