Usually not one for tacky clothing or far-out ideas, Rarity nonetheless fulfils a generous if somewhat embarrassing dressmaking commission to please Derpy Hooves.

Unfortunately for her, a generous act can have... strange and unexpected consequences, especially when poor, simple, over-the-moon-grateful Derpy insists on repaying the kind deed.

Of course, Rarity will take it all in stride. And so will everyone else. It's only fashion, after all. No one ever gets silly or over-the-top about that, right?

Impossible Numbers' entry for The Obselescence Memorial Jinglemas Twinglemas Secret Santa Sendoff: Part 2 Edition!

My specific prompt from DragonGeek: tagged "Rarity", tagged "Derpy Hooves", rated "Everyone", no romance.