https://www.deviantart.com/jeffjr8404/art/Ryan-s-GYM-MTF-TG-caption-973796116
Ryan is a mild fitness fan; he goes to the gym once a week to burn fat and get fit.
One day, when Ryan was in the gym, he got on the treadmill and started to run.
While he was running, he felt a pleasing tingle in his chest and increased his speed.
Then he felt his waist widen and his penis contracted into a slit, while his body shrank.
Finally, his clothes start to morph to his new curves.
As he finished, he got off the treadmill and went to the locker room to change his clothes,
When he looked in the mirror, he was surprised by her new body and excited about how much fun he was going to have that night.