No Boys Allowed!
Man, this one went through several "kinks" (adjective pun). It was originally just Fluttershy and RD alone, but I felt it'd be more fun with the rest of the girls. Then came the fine balance of having them in their skimpies, without the "Horse RPG", while still holding on to a degree of family-friendliness. The original Fluttershy pillow fight was kept intact, and we have the end result.
You guys love socks, right?
**An unauthorised R34 edit of SSPS has been pointed out to me. Not cool, Internet.
"My Little Pony: Friendship is Magic", "Equestria Girls" & Original Characters © Hasbro