Rainbow Dash is a frequent visitor to the Cloudsdale Gym. But every time she sees her friend Fluttershy the following day, she seems to be in a happy daze. Curious, Fluttershy asks and Rainbow offers to show her this workout that is guaranteed to help her out.

Contains: Hyper Cocks, Hyper Breasts, Titfucking
This is part of my 1K Challenge.
Couldn’t find a reliable source, so the artist’s name is Marauder6272