Second drawing in the “Musclestria Girls” series, featuring Fluttershy as she wears very tight clothes to show off her strong muscular body.
Drawing number 3 will feature Twilight Sparkle and is set to arrive very soon.
Other drawings in the series:
~~Musclestria Girls #1 ~~ Starlight Glimmer (https://derpibooru.org/2061919)
~~Musclestria Girls #3 ~~ Twilight Sparkle (https://derpibooru.org/2064381)