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Rated: 18+ · Interactive · Erotica · #2205983
A dominant female enhancement story. Will award 1,000 or more GP if a chapter is added.
This choice: Muscle Growth Serum  •  Go Back...
Chapter #4

Muscle Growth Serum

    by: Arkaror Author IconMail Icon
Tracy loved to bully others at school, because you see, at home she was the one getting bullied.
By her 3 years older twin siblings. Stella and Adrian.

They loved to compete with each other, almost as much as they loved to pick on Tracy for everything.

When Stella and Adrian were 14, both joined the gym to always be stronger than each other, making them one of the strongest students, if not people at school.

Adrian was about 1,89m and weighted 95kg of pure muscle, but Stella always were the strongest.
Standing at 1,78m and 110kg of muscle, but still DD tits.

One day both of them were in their basement, the home-gym, as Tracy decided to spy on them for once.
Both of them curling massive weights. She couldn't see how much it was, however Stella loved to brag about her record of 115kg for a few curls.

Letting out a loud grunt, Stella dropped the weights to the ground, cracking it beneath the barbell. She walked over to her bag, and grabbed a bottle of water.

"You can go up 'little' brother", Stella said with a smile, "I have some things to do."

Just like it was a command Adrian stood up and left the basement, without noticing Tracy hiding behind the door.

As soon as he left the room, Stella grabbed a small bottle with blue liquid and a syringe from her bag.

"That's how she got bigger than Adrian", Tracy said to herself as Stella injected the blue shimmering liquid into her veins.

Letting out a slight moan, she stored both in her bag and walked again to the barbell,
Tracy's eyes widened as Stella picked it up and made several repetitions like it was nothing. Tearing the fabric around her bulging biceps.
After 30 repetitions she seemed to lost motivation and just dropped the barbell again onto the ground.

"I need that and I need that now", Tracy thought as she sneaked back upstairs, to not get caught by her massive sister.


During the night Tracy couldn't sleep a second. She could only imagine herself with big rippling muscles, just as her siblings. No, bigger muscles.
So decided to sneak into the basement, hoping Stella would have a stock of those bottles.

Possibly hours passed until Tracy finally found what she was looking for. Inside of a container for protein powder there were several bottles and syringes.
Tracy quickly grabbed the container and rushed back into her room.

In her room and without further hesitation she filled a syringe with the blue liquid and injected it herself, just like she saw her sister do it.
A feeling, like her veins are burning started to appear, where she injected herself, which quickly spread over her whole body.
It was a wonderful feeling, her whole body burned as she began to pump her muscles, like her sister, first by doing push-ups, then by doing them one armed as it quickly became to easy for her or her growing muscles.

Slightly exhausted she stood up and walked in front of her mirror to flex.

"Disappointing", she said to herself.
You could clearly see a small peak on her biceps, the size of a tennis ball but she wanted more.

She took out three more vials of liquid, filled the syringe and injected it immediately.

The burning started again, more intense than before. Tracy bit her lip to not scream in pain, as she passed out.

As she woke up she saw her new self...

You have the following choices:

1. Much more muscular

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2. Much more muscular and taller

*Noteb*
3. Other

*Noteb* indicates the next chapter needs to be written.
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