The mane six, the alicorn princesses, and Flash are spending the day and night together in Twilight's castle(for a celebration, a meeting...etc) then a pink light envelops the room from the outside/the window outisde looks pink; then it causes them to 'change', and gives them the urge to dress and act differently as well.

Flash then gets pulled into an experience, he never thought would happen to him in his entire life. Now he wonders if he could get used to the changes that is happening around them and love it.

Co-writer: https://www.fimfiction.net/user/433872/HailHydraz