Lee took a potion out of the box that was labeled "Transgender". He couldn't believe his eyes. He had always felt that he had been born into the wrong body and had been thinking about telling his parents he needed a gender change. Now he wouldn't need to. But he read the description just in case to make sure that everyone would think that he had always been a she. He wasn't disappointed. He also read that he could change back whenever he wanted to if he was unsatisfied. A slow grin crept across his face. He locked the door even though he knew no one else would be home for a while and stripped completely. He wanted to see himself change and be able to greet his new body immediately after he was done transforming. He popped the cap off and drank some. He noted that the letter was right when it said it would never empty.
Then the changes began.
The first thing that happened was that his feet and legs slimmed and lost all their hair. Then he saw his penis and testicles begin to shrink and get sucked into his body, being replaced by a vagina. The next thing he felt was as if someone was cutting a hole in between his legs. Next he shortened and some of his weight was transferred to his waist, and his torso became smaller. The following changes Lee could not see, but he sure could feel them. His insides shifted around, making room for the uterus, fallopian, and ovarian tubes replacing his testes. Then two moderately sized breasts appeared on his chest, followed by a process similar to what happened to his legs with his arms. The last two thing that happened she had to look in a mirror to see. Her face became more feminine, losing the small amount of stubble that had grown there recently, and lengthening her hair, as well as changing it to a deep brown color.
Lee felt around her crotch and chest to make sure she wasn't dreaming or imagining everything. She smiled. She had become Leah.