Caramel's Entrapment by zulu
Link - https://www.fimfiction.net/story/21155/1/caramels-entrapment/chapter-1

"Caramel wants to buy a dress for Wind Whistler, but when he screws up and destroys some of Rarity's mannequins, he is forced to stand in as her dress doll/plaything. Things get heavier from there, and then Pinkie Pie shows up."

Music used:
Theme for Scanty & Kneesocks (2010) performed by TeddyLoid, Panty & Stocking with Garterbelt OST produced by Taku Takahashi
I own nothing in this video.