Ty looked over and saw Kate, a cute girl with long, black hair, sitting just a seat over from him. She wore a t-shirt and shorts, and her hair came just up to her shoulders. Every time Ty turned to look at her, she smiled back, and this gave him the idea to have some fun with her.
"I had some fun adding some muscle to one of the guys, so it should work on the girls as well, right?" Ty wondered to himself. So he wished for Kate to gain about fifty pounds of muscle right then and there, but she would still remain beautiful and attractive at the same time!
Right away, Kate's arms and legs began to grow thicker, longer and wider, as they filled out with rock-solid muscle all over. Her traps, her glutes, and her delts filled out her shorts and her shirt, making her clothes suddenly feel extremely tight. The poor girl squirmed in her seat, and she tugged on her tight clothing a few times, as he body continued to grow.
Her biceps grew insanely huge, ripping through the long sleeves of her t-shirt! She started to grow even bigger than some of the guys!
"Holy CRAP! What is this?" she said out loud, as she looked at her arms and her legs.
Next, she grew pecs under her expanding breasts. Her pecs made her breasts push out even further, while a powerful six-pac of abdominal filled up her torso. Her shoulders widened even further, until her t-shirt practically tore in half. And, Ty just chuckled, while poor Kate quickly transformed into a muscle-girl!
Finally, as the bell rang, he got up and approached her, as she struggled to get out of her small desk.
"Wow, Kate! You've been working out, huh?" Ty grinned.
"Yeah... I guess you could say that..." Kate replied, as she flexed both arms, showing off her impressive biceps.
"You look great! Keep up the good work!" Ty said, while trying to hide his own hard-on.
They both walked out of the classroom, as Ty looked for the next person to change....