The Nanobots.

Frank was on the school wrestling team & then one night he was involved in a car accident & was not likely to survive.

His parents were given the option of a radical new treatment he would be injected with nanobots that would rebuild his body from the Inside out.

Things did not go to plan as the nanobots rebuild his body with one slight side effect they rebuild his body to what it would have been like if he was born a girl.

He was happy that they saved his life but not at the expense of his manhood. 

His mother on the other hand was over the moon she had always wanted a daughter & now she had one.

She dressed him in pink dresses and frilly lace underwear but the straw that broke the camel's back was when he got back from school one day to find that his mother had redecorated his room in a hello kitty style and thrown all his old stuff out on top of dealing with being a girl and his monthly visit that had just started to contend with he had his mom who was determined to turn him into the perfect little lady.

He was sick and tired of his mother meddling in his life and was not happy with the dress she made him wear to the school dance it was all too pink and silly for his tastes.

He was hanging out with some of his old wrestling friends who were still finding it hard to believe that they're old buddy was now in the body of a girl.

His friends knew he couldn't resist a bet they just wanted to have a bit of fun with him but they sort of forgot how competitive he was and being a teenage girl did not seem to mellow him one bit.

The deal was if he could bench press the same as his friends he would not be picked on anymore but if he could not he would have to go to prom as one of his friends dates and he was determined not to be seen at senior prom on the arm of one of his friends.