Critical Mass [FMG, GTS, BE, fast growth, ascension, beautification]

[MGS-and-M]

Hey there, folks. Been a member of the forum for some time and recently started to write FMG stories, trying to give a contribution to the genre. Here's one of them. Hope you enjoy!

Comments are very welcome.

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Nathalie was desperately punching the blast door.

"Please let me out! Open the door!"

The research related to the Iota radiation, extracted from the recently discovered Ithilium element, was progressing above expectations; in less than a month, the team of scientists at ZCorp had already managed to stabilize the release of particles and observe their penetration and impact on a wide variety of materials. But that day, something went horribly wrong. An accused error was overlooked as a regular routine entry, and the particles launcher started the scheduled test without loading the safety protocols. The general malfunction immediately triggered the emergency containment procedure.

When the alarm went off, the scientists rushed out of the test chamber. Everyone except Nathalie. Checking a device in the corner opposite to the exit, the reinforced concrete and lead door slammed shut before she could leave.

Michael, a machinery assistant that was on another room, was escaping when he saw Nathalie through the small window of the blast door. He immediately stopped.

"There's someone still in there! Open the door!"

He tried to activate the door's control panel, but it wasn't accepting any commands.

"Help me here! We need to take her out!"

One of the scientists stopped, frightened.

"I'm... I'm sorry"

And ran away.

"You fucking cowards!"

He looked again at Nathalie. She was crying, her quivering voice muffled by the door.

"Please help me! Get me out of here!"

"I, I will find something"

"No! Please don't leave me!"

Michael ran and picked up a shovel in the maintenance room. She wiped her tears when she saw him coming back. He started to bang on the door with all his might, but the shovel barely scratched it.

"Fuck! Fuck!"

Nathalie looked back. The hum of the particles launcher intensified, ready to fire.

In panic, Michael smashed the door's controls, but nothing happened. He was punching the door, staring at Nathalie's terrified expression, when they heard a screeching metal sound and the particles launcher blasted.

He ducked, seeing a bright orange light come out of the door window. After a few seconds, the light faded and the alarm stopped. The security system, analyzing and confirming that there was no contamination or any other danger, ended the state of emergency and the blast door opened.

Nathalie was lying face down on the floor.

"Oh, no"

Michael crawled to her and held her limp body.

And smiled. Through her mouth, he could discern a weak breathing.

"You're alive! Oh thank God!"

She slowly opened her eyes.

"I'm... I'm..."

"Yes, yes! You're good!"

"H-how?"

"I don't have the slightest idea. God, I can't believe it"

Nathalie tried to stand up. Michael helped her.

"How are you feeling?"

"Fine, I think. Just my skin... It's kinda tingling" – her expression was one of incredulity – "I, I should be..."

"Don't say that"

Staggering a little, she walked to an apparatus in one of the chamber's divisions.

"I'd better do a check. Can you help me?"

"What's this?"

"It's a monitoring scan. We use it to verify traces of the component left in the objects we test"

She inputted some commands in the terminal.

"Just press here when I'm in the blue spot over there"

"Ok"

Scratching her forearms, she got inside the glass tube and the scan was initiated. They were facing each other.

"Thanks"

"Don't need to. Wasn't able to do nothing for you anyway"

"But you stood. You tried"

He gave a timid smile.

"I guess so"

The machine beeped, indicating the end of the scan.

"What does the monitor show?"

"I don't know much about this, but I think it's saying that you have, uh, particles still in you"

She got out and checked the results on the screen. She looked puzzled – "That shouldn't be possible"

"Why?"

"The composition of the human body is not capable of maintaining active particles"

Michael glanced at her. She was scratching her belly and her neck incessantly.

"Are you ok?"

"The tingling is worse. As if it's going deeper in my–"

She suddenly gasped, then let out a scream that made Michael flinch. Her body began to shiver as if she were in a heavy frost. Embracing herself with both arms, she shut her frightened eyes as a harrowing pain invaded her senses.

"Nathalie! What's happening!?"

"My skin... It's shredding..."

"No, Nathalie, no. Listen to me! Your skin is fine. You must be having an intense fever"

Michael tried to assist her, but was surprised by an unexpectedly strong shove that threw him flat on the floor. Nathalie muttered something unintelligible before losing balance and falling on her knees, overwhelmed by the dreadful sensation dominating her body.

Michael didn't know what to do. He thought about searching for a first-aid kit, but there was something else happening with Nathalie that was strangely numbing him. He couldn't spot at first, but, when she gripped her head with her hands in anguish, he got a clear view of her exposed forearms. They were changing. As her shaking intensified, small bulges started to appear above her wrists. They didn't appear to be bumps, but muscles, surging along with veins spreading on the surface of her soft skin. In the upper arm, bigger bulges rose from the white fabric of her clothing; it was her biceps, their mass increasing rapidly as the whole arms were getting larger.

The loose lab coat was soon stretching everywhere, taking the form of the limbs and torso swelling with muscles under it. She set one foot on the ground, then stood up with a heavy step. Her chest and back had visibly widened, carrying two round boobs where there were mosquito bites, ballooning their way behind her arms still lifted. Her legs, once skinny, became two stiff columns coming from her toned hips. Her thighs kept growing, reaching the girth of fire extinguishers, every set of muscle outlined on the leggings glued to them.

The trembling gradually diminished, then ceased. She finally let go of her head with a long, relieved sigh.

Michael just stood there, paralyzed, staring at that powerful and alluring female figure that has blossomed in front of him, unable to hide his arousal.

Both remained in silence for a moment, lacking the words. In a polished metal surface of one of the mainframes, Nathalie saw bewildered the reflection of what seemed to be a gorgeous, curvaceous bodybuilder stuffed in a kid's lab clothes.

"The particles must have released energy. And my cells... they..."

"Reacted to it" – Michael said, a little embarrassed.

"Yeah. I believe so"

Nathalie unbuttoned her lab coat and raised her shirt, revealing a mesmerizing section of abs. She naively contracted and relaxed the little brick wall that has formed in her belly, then touched in awe the rigid midsection and the toned obliques around them. Michael had to control himself not to get a hard-on.

That's when they began to hear a vague noise coming from the sky. As it got louder, they distinguished the sound of helicopters. There were at least three of them. They passed the lab, but didn't go away. The sound changed, as the engine's gear shifted to a lower pace and they began to descent.

They ran to the access corridor on the second floor. From the railing, they had an open view of the first floor. The entrance hall was soon taken over by soldiers, wearing black uniforms and masks that hid their faces completely, probably some sort of military special force. They counted more than fifty men.

Michael frowned – "This doesn't look good. At all"

He looked to Nathalie.

"There's no other exits to this building, right?"

"Not that I know of"

"Fuck, there's no way we can pass them unnoticed. And they are gonna get here anytime"

Without warning, Nathalie rushed back to the test chamber. Michael followed her, but, running very fast due to her new physique, she left him far behind. When he reached it, Nathalie was looking around hastily, but there was nothing there that could help.

Or maybe there was.

Her eyes locked on the particles launcher. Climbing onto the platform on which it stood, she put one hand on either side of the heavy machinery and tried to lift it. It didn't budge.

"Wait! I can help you!"

Michael approached but, before he could get to the platform, Nathalie gasped, directing all her might to her arms. The muscles fully tensed, making the lab coat look like a second skin, and the launcher slowly started to rise. As she bent her elbows, one of her biceps tore through the sleeve, revealing distended veins carved on the round, firm bulge. Taking it away from its support, she stepped to the edge of the platform and threw it violently on the ground. Michael jumped in fright at the loud noise of the machinery shattering.

Nathalie got off the platform. The boots footsteps of the soldiers were getting closer.

"Nathalie! What are you doing!?"

She grabbed the Ithilium bar from its wrecked capsule. Her hand was shaking by what she was about to do. Michael watched terrified as she closed her eyes and swallowed the bar, forcing it down her throat.

A few seconds later, the troop arrived. It spread rapidly through the test chamber. Two soldiers approached Nathalie and, when she threw one of them to the ground, four others immediately came to hold her down. They were using all their strength to keep her still, so two others could bring a restraining device, a sort of a metal straitjacket that enclosed her from the top of her arms all the way down to the knees.

Two others went to Michael, easily subduing him. The commander came to inspect.

"What's his status?"

"He was outside the test chamber, sir"

"Take him away"

"Wait! No! Get off of me!"

Michael tried to fight, but a precise blow to the back of his head knocked him unconscious. Nathalie watched with a bitter teste in her mouth the soldiers carrying his body out of the test chamber. She lowered her head.

The commander continued.

"Bring the equipment. We will get the samples here"

A group of eight men left the test chamber. The commander turned to a soldier next to him.

"And the fugitives?"

"Both were found and detained, sir"

Nathalie then raised her head.

"I think you should run"

She let go a loud groan, then began to breath heavily. The whole squad turned to her.

"I think you should run right now"

Her breathing turned into grunts, like feral moans, laden with a feminine lust that sent shivers down the soldiers' spines. Suddenly, she struggled with a harsh movement, throwing and scattering in the ground the guards holding her.

Not covered by the straitjacket, her shoulders started to bloat. The already tensed fabric of the lab coat quickly gave way, revealing ripped deltoids, trembling and enlarging furiously. At the bottom, her calves erupted almost instantly through the leggings and her shoes burst open, exposing her bigger, yet still gracefully silhouetted feet.

But they were not the only ones. Under the steel restriction, her pecs, chest, abs and thighs were hungrily absorbing the energy of the Ithilium bar. Her biceps and triceps began to overflow its confinement, gradually releasing itself as the metal started to bend, her shoulders now the size of volleyballs, her traps arising like solid hills behind her neck. Unable to contain Nathalie's tremendous expanding mass, the straitjacket split at once, the debris sent flying away on the test chamber, hitting several soldiers. The growth of the freed muscles redoubled, tearing what have remained of her clothes and swelling until they caught up the enormous proportion of the others.

When the transformation ended, Nathalie was naked in the middle of the test chamber, a perfect hourglass shape sculptured with luscious and imposing muscle curves emerging from every corner of her body. The whole squad took a step back, trying to keep focus that the magnificent sight in front of them was a deadly threat. 

The commander was brief.

"Take her down"

The soldiers drew their Uzis and, without blinking, started firing.

Nathalie instinctively rose her arms to protect her head. She felt the heavy impact of the projectiles, but they were not hurting her. The pain was quickly replaced by a strong heat, as she felt her veins popping under her skin, her blood circulating like a torrent of lava, fueling her muscles that expanded at a frightening rate.

"Keep shooting" – shout the commander.

Her nipples got hard. The heat was becoming more and more pleasant, turning into a wave of arousal like the ones that precede a mind-blowing orgasm. Drowned in pleasure, she whispered, the words coming out like a subtle, hypnotizing echo.

"Yesss... Keep shooting..."

The bullets, unable to pierce her skin, fell one by one on the ground. Muscles on top of muscles, she kept getting bigger and bigger. The more bullets hit her body, the more her growth accelerated.

When they emptied their magazines, she had become a mountain of sheer musculature and power, towering more than half a body than the highest soldier, her delicate face surrounded by a plethora of rock-hard flesh.

Calmly, she walked through the squad, tossing the soldiers in her way like ragdolls. When the commander tried to flee, she fastened her pace, the floor shaking with each step. She grabbed him by his neck with one hand, taking him off the ground.

Through her lips came a deep, lustful and threatening womanly voice.

"Where are you taking Michael?"

"I... won't say"

She pressed his neck more. Her arm trembled vigorously, then started to expand right in front of him. She groaned as the growth flow continued, crossing and enlarging her pecs, broadening her back, making her gargantuan traps taller than her head, and reaching her other arm, filling it with pounds/kilograms and pounds/kilograms of dense muscle mass. Her veins dilated more, sending the monstrous power inside her down to her thighs, thickening them to the size of oil barrels, lifting the commander even more just with her height increase.

"Where are you taking Michael?"

"Carrington base... uuuh... south of mile 168 of Highway 17"

With a menacing look in her eyes, she brought him closer to her massive chest, then got rid of him, hurling his seemingly weightless being in a nearby console.

She looked down at the exit that not long ago trapped her inside the chamber. Now, it was like a tiny hole. She placed her tender hands on the large wall and, with an effortless push, it started to crack, then succumbed to her humungous strength and collapsed. Even with the passage still not wide enough, she just stepped into it, the mere touch of her smooth skin powerful enough to bring down what was still standing in her way, crossing the concrete and lead structure like it was a curtain door.

But just before getting out of the lab, she stopped. She could feel a new growth spurt coming, the Ithilium bar pulsating inside her like the core of the sun. She moaned, her libido rising uncontrollably. She was sensing that it would be a really, really big one.

[MGS-and-M]

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[Wookey]

Wonderful start

[MGS-and-M]

Wonderful start

Thanks, man! This one is a stand-alone story, but some people (also on DA) asked for a sequel. I'm considering making it.