December Pinup #1 Winner! (Patreon)

And the winner of the first December pinup is...

Brimming With Sick Gains! - Hoping to get in shape to impress his new girlfriend, timid and heavyset nerd Bert Eile starts taking experimental Brimstone Protein Supplements in hopes of packing on the muscle fast. These supplements work surprisingly well, but he experiences more than just the usual kind of gains...

Cut to a few months later, and Bert Eile- or Belial, as she goes by now, has gotten properly jacked-though her gains have taken a distinctly feminine shape, and come with a downright demonic visage. She's also dumped her frumpy girlfriend for a posse of hotties who can properly appreciate her bod, quit her boring old job to be a full time fashion and fitness influencer, and spends all day showing off for her fans and shilling Brimstone brand products.

Has our erstwhile nerd fallen under the influence of sinister powers? Maybe, or perhaps Belial was always waiting inside Bert, just waiting for the confidence and the excuse to get loose and live her best worst life.

(Human male to buff female tiefling; nerd to pop-jock)

Thanks to everyone for voting and big thanks to ChiCha for the suggestion!