Gym Addict FMG (Patreon)

After high school, this little lady decided she wanted to be a fitness model, but she wasn't big on hard work. Fortunately for her, she stumbled across a website looking for volunteers for an experimental gene therapy that promised to improve nearly all aspects of a person, particularly their strength. After the procedure she found the gains came quickly, and her desire to build more muscle increased just as fast as her muscles gained in size. Eventually she was addicted, spending more than half her day in the gym, and finding out just how much larger the therapy had allowed her muscles to get above normal.

Nothing fancy with this one. It was all I could do just to get it rendered.