In a research lab.

When the hand gave something big and hard, she looked and saw that it was a dick that was attached to her. Only after that did she start waking up for good and remember that she was not in her room, but in a research laboratory.

At age 20, she had a fetish for futanari and always wanted to be like them, until she learned of a genetic research laboratory that she was looking for volunteers to serve as guinea pigs to test a treatment that would allow women to have male genitalia without sacrifice the female part. She found it interesting and volunteered. She just thought it was a shame that the procedure had to be done with her ****, so she couldn't see anything.

Finally remembering what had happened, she decided to examine her new genitalia. She was surprised at how well the experiment had worked. She even had balls and confirmed that her vagina was still intact right behind.

"I see you finally woke up and it looks like you liked the result." said a doctor when entering the room

"This is better than I expected. I can't wait to show it to my friends." Emma said

"But you will have to wait. You should stay here for a few days, just for a few more tests and keep an eye out for possible side effects." the doctor said

"Can I at least leave the room?" Emma asked

"Yes, you are free to walk around the lab. Who knows, maybe you will befriend other volunteers?" the doctor said