How I Became a Kaiju

Story by Fleetingsanity on SoFurry

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Jenna an out of luck overnight custodial worker stumbles across a strange gas that has some very unique effects on her. As Jenna finds herself getting bigger and becoming less human-like she soon finds herself addicted to the feeling.


Jenna pushed open the door in front of her "hello?" she said meekly to the dark empty room. "How many rooms does this place have?" she asked the open air. When no answer came, she sighed and groped blindly at the side of the wall till she found a light switch. With a click, row by row the halogen lights came on illuminating the large room.

"And why are they all so big!?" Jenna groaned annoyed. She pulled her mop and bucket through the door behind her. As the door shut, there was a large Restricted Area: Decommissioned Storage printed on the door. Jenna didn't even notice she just popped her headphones in and went to work mopping the floor.

This wasn't exactly Janna's ideal job it was an overnight custodial job. There was only a skeleton crew on overnight consisting of security who spent more time sleeping than walking the halls and janitors who did their best to clean as much of the facility as they could before the morning staff rolled in. Sometimes some scientists stayed late burning the midnight oil working on some project. Mostly though the place was abandoned at night.

Which would have been nice if this place wasn't so spooky at night. Jenna brushed some of her long blond hair back and pulled up her jeans. These jeans were fairly new and already it felt like her ass had gotten even bigger. She grumbled annoyed it's not that she minded her ass getting bigger she liked being as curvy as she was, and more curves were never a bad thing.

She just didn't have the money to drop on more pants. Money was so tight these days which was why she took this graveyard shift job. She was desperate, part of her thought about getting into stripping or webcamming. She knew she would do well at it. After all, she was a big tittied, curvy, blond, but she could never work up the nerve to do something like that.

Her train of thought was cut off as one of her favorite tunes came on her iPod. Grinning and starting to bounce to the music Jenna danced around now swinging her mop carelessly. As she spun wildly her mop swung out and struck a canister on a pallet near here. "Oh shit!" Jenna said turning just in time to see the canister fall from its resting place and slam down onto the floor, directly onto its valve. There was a clatter of metal followed by a loud hiss.

A fog billowed out from the canister filling the air around Jenna. "Oh no! Oh no!" Jenna said spinning around panicked. She was hyperventilating now unsure of what to do. As the mist flowed into her lungs she coughed for a moment "oh god what is this stuff!" As the gas spilled into her airways her throat and lungs felt cold.

Soon a tingling sensation ran through her body Jenna let out a moan the sensation felt pleasurable. The cooling sensation in her lungs now felt refreshing. As she inhaled more Jenna could feel her clothes getting tighter. "Ohh something is happening to me? What is this gas?" she asked as her mind swam in pleasure. Gently swaying she couldn't help, but giggle. She felt so good right now.

"Mmmm I think I want more," Jenna cooed taking another deep breath. As she did her body grew even bigger. Her breasts bulged out turning her once form-fitting shirt into a tank top "ohhh my boobs are blowing up like balloons. They're huge!" she cried out. Her leggings were pulled up higher and higher as her ass and hips flared out "unnghhh my ass is getting so fat!" Jenna said reaching back sinking her hand into her inflated butt cheek. Her G-string was now visible as her expanding butt ate her pants.

Looking down Jenna got overwhelmed by a sense of vertigo "why am I up so high?" she said confused "am I getting bigger?" With each lungful of this strange cloud, the once short blond was growing taller and taller, she was now almost eight feet tall. Her breasts continued to balloon out swelling perfectly round. Rips started to form in her top as her melons quickly became weather balloons.

Realizing she was soon going to be naked Jenna started to freak out "shit I gotta get out of here before I outgrow my clothes." Rushing away from the pallet of canisters Jenna knocked over her bucket and mop on the way out. Once she got to the door, she realized just how much bigger she had gotten. The doorknob was small in her hand. Her head was above the door frame she had to duck to get out.

"What did that stuff do to me?" Jenna said worried as she quickly and quietly made her way out of the facility. There was no way she could fit in her car, so he had to make her way home on foot. It took a bit of time, but Jenna finally heaved a sigh of relief when she forced herself into her one-bedroom apartment. Jenna had to practically crawl around in her own home.

Once in her bedroom, she finally got a good look at herself in her full-length mirror. "Oh my god! Look at me! I'm so big! My tits are huge!" Jenna said excitedly groping her now lap filling tits. She moaned as her sensitive breasts responded to her fondling. Her nipples grew hard poking out through her tattered top.

Pinching her large nipples between her fingers she gasped in pleasure. "Ohhh my tits feel so good," as she played with her breasts more Jenna continued to look over her body. Her waist looked narrower or maybe it was just her hips had grown that wide she wasn't sure. Spreading her legs her pussy looked like it had been pumped up. It was so full looking between her legs.

Still, the more Jenna looked the more she could see changes. She had these strange bumps on her forehead. Along with her skin looked too smooth, on top of that it also looked like it was off-color like she was pinker. "I don't know what that stuff did to me, but I kinda like it," Jenna smiled to herself in the mirror.

Turning over she looked back at herself "holy shit what an ass," she said as she smacked her ass cheek. "Baby's got all of the back," Jenna said as she giggled to herself. Getting more aroused by the second she rubbed and caressed herself more "look at you, you're just so curvy and hot now!" Putting a hand down her pants she started to masturbate to her appearance "such a fucking how sexy goddess you are now, so tall, so strong!"

Jenna continued to egg herself on playing with herself until she eventually couldn't stay awake any longer and passed out in a puddle of her love juices. As she slept, she dreamed she was back in the facility. She picked up another of the canisters from the pile cracking open the valve she started to suck from the end of the metal tube.

She moaned in delight as she started to rapidly grow and grow and grow. More she thought to herself, more! I want to be bigger! The more she sucked the more of the gas-filled her up she kept getting bigger and bigger. She was sucking so hard now her belly was blowing up too with the gas. More and more of the gas poured into her soon she was starting to get bigger than the room.

Time to stop she thought to herself as she went to pull the tube away, she couldn't. It was stuck between her lips. As she tried to pull it away, the gas flowed faster. She started inflating much faster now just faster and faster and faster. She kept growing and growing and growing. I can't pull it out she thought to herself. It's going to keep blowing me up, bigger and bigger forever! I'm never going to stop! Just bigger and bigger and bigger!

Jenna snapped awake with a gasp. It was still dark out and she was soaked between her legs. Looking in the mirror she could see she had shrunk back down to a slightly, more normal size. Her tits were still the size of beach balls and her ass could easily fill an armchair. "I have to go back," Jenna said "I don't want to be small again, I want to be huge! Bigger than huge massive!"

Getting up she quickly changed into some now very tight but less tattered clothes and made her way back to the facility. Given she had to do it on foot again the sun was coming up by the time she got back. It was still early enough that the night skeleton crew had not been relieved yet. Jenna breathed a sigh of relief she still had time by the time anyone found her they would be too late to stop her.

Returning to the scene of her awakening Jenna walked up to one of the many cylinders on the pallet she had stumbled upon. Opening the valve on another full canister she started to suck the gas directly out of the metal container into herself. With such a direct and concentrated blast, Jenna's changes were much faster.

She moaned passionately against the valve as the icy chill coated her lips, mouth, and lungs. She rapidly grew out in all directions her hips and ass tripling in size pushing out against the other pallets of strange objects around Jenna. Her billowing bosoms pressed up against the pallet of gas canisters pushing her back against her ass.

Jenna was now stuck between a soft place and a bouncy place. She continued to inhale the gas like her life depended on it. The clothes she had put on stood no chance. With pops and tears, she was quickly naked. Not Jenna cared she just wanted to be bigger, plumper, more inflated, sexier.

As she grew bigger all over Jenna was able to hold the can of gas in one hand. She was getting so big now it was incredible. Once the first canister was empty Jenna picked up another one breaking off the valve, she inhaled the next batch of gas. Looking down at her hands they were bright pink on one side and white on the other side. Weirder still was her skin no longer looked like skin it was shiny like plastic.

The more Jenna inhaled this gas the less she looked like a normal person. It was like she was turning into a giant blow-up toy. Or maybe blow-up doll was a better comparison given the size of her tits, ass, and pussy. She was turning into a big sexy blow-up doll. Though as she heard two pops on her head, she reached up to find she had two horns sticking out. There was another pop behind her and looking back Jenna could now see a tail swishing from her backside.

Lastly sprouting out from her back was a pair of plastic wings. I'm not a blow-up doll Jenna realized I'm an inflatable Kaiju. This is perfect she screamed in her head she had always had a bit of a thing for monster movies and was something of a closet furry. Now here she was turning onto some hypersexualized monster. As the second canister emptied Jenna's head hit the ceiling and she was still getting bigger.

"Uh-oh I'm running out of room," she said looking around at the shrinking space "I guess I'll have to grow my way out," Jenna said grinning. One by one she popped the valves off of the gas canisters and swallowed them whole. As the gas flooded her stomach Jenna's belly billowed out joining in on her other curves. It only took a moment before the gas really went to work inside of Jenna.

"Ohhhh now we're talking!" she said moaning as her arousal grew along with her size. As she expanded bigger and fuller the room around her started to shake "Ohhh here I come world!" Jenna shouted in pleasure as the pressure pushed her into orgasm after orgasm. The building was shaking around her now as she applied more and more pressure to the walls.

Elsewhere security guards and scientists gathered around a group of monitors "what the hell is happening!?" bellowed a hard-looking woman as she entered the monitor room "why is my building shaking!?" she added as she placed her hands on her hips.

"It's one of the custodial staff, Ms. O' Brien, she got into the restricted area and has been exposed to the funny-rubber gas," one of the security team said queuing up the footage showing a woman growing on screen. It was clear her enhanced assets had some of the others feeling a little uncomfortable.

Donna O' Brien shook her head "that stuff actually works!? It was a pipe dream, sounded more like something out of a cartoon," Donna was about to continue when there was a massive boom. Looking out the window all she could see towering in the air was a pink and white-colored dragon girl.

"We have to stop her here, if the public sees her, we'll be ruined," Donna looked around the room of blank faces, "think people!" she barked "how do we stop this monster woman!?"

"Uuumm what if we had our own monster?" a meek voice said from the back. The room full of people stepped aside revealing a shorter, silver-haired, thin, young woman, wearing red glasses, and what seemed like a lot of latex under her grey lab coat.

Donna pointed her finger at the younger woman "you, you're the one who made the gas in the first place, why didn't you tell anyone this would happen?"

Julia the silver-haired scientist rubbed the back of her head "well ma'am you never let me get to human testing so I had no idea this would happen." Julia stepped forward clenching her fist "though if you'll let me, ma'am, I can fix this."

Donna stroked her chin "oh really and how is that?"

"I have a ready supply of funny-rubber gas in my lab and I have an active catalyst agent I can add to speed up the process," Julia looked Donna in the eye "I'll be able to catch up to her in size then get out there and stop her if you'll let me."

Donna nodded "done, make it happen, stop her and your projects will be fully funded for the next three years." Julia looked shocked she was about to say thank you when Donna cut her off "get going!" Julia eeped nodded and took off towards her lab.

Jenna was in her glee. She was so massive, her tits were so fat and sexy, her ass cheeks so plump and juicy, and even though she had never really wanted a belly. Now looking at the massive round dome under her breasts she couldn't help but think that was hot too. "Ohhh yes look at me I'm so hot! So huge!" her voice boomed. "Unnghh and just so horny I need relief," looking around Jenna could see some taller buildings off in the distance.

"Mmmm I think a horny giant blow-up toy could make good use of those," she said as her forked tongue came out licking her lips. Each step carried her hundreds of feet her blimp sized titties bounced with each step. Jenna felt so light it was so much fun being a big sexy balloon. "I wonder if I can blow up even bigger?" she mused to herself as she moved away from the facility that had spawned her.

Jenna was so in her own little world she didn't notice when there was a second crash coming from the building behind her. Julia had enacted her plan and was already just as big as Jenna was. Having inflated so fast Julia was just a ball of lust and passion. Once her eyes landed on Jenna, she couldn't help but bound over to the hyper curvy inflatable dragon woman.

Julia herself had become something different entirely her skin was dark purple, she had a long canine-like snout, a large what would have been puffy tail except it was made of plastic. She had large paws instead of thin lizard-like fingers. Julia looked more like a wolf. She made her way over to her target. Grabbing Jenna by the shoulder she spun the other balloon kaiju around "hey there sexy," was all Julia said before kissing Jenna.

Jenna's eyes went wide as she was kissed, but quickly she melted into it. She was already so hopped up on adrenaline and lust she didn't care who this was right now. All she wanted was what the other woman was clearly offering. The two women's hands started to roam each others' bodies caressing each other.

Their ample breasts squished together; their hands sank into each other's gigantic asses pulling each other roughly together. While they kissed Julia inhaled deeply through her nose before blowing through her lips. Jenna groaned lustfully as the other giant woman's hot breath pushed its way inside of her. Ohhhh she's blowing me up even bigger! Jenna thought to herself as Julia continued to huff and puff into the other balloon girl.

"Ahhhh yes! More! More!" Jenna cried out as Julia pulled back from the kiss taking another deep breath. Julia's chest and breasts expanded bigger and bigger as she inhaled longer and longer. When she finally blew into Jenna's mouth again the dragon girl swelled out massively in all directions. Her body started to round out. Her breasts expanded bigger than Jenna herself. She wasn't getting any taller now just rounder.

Julia stopped blowing and Jenna let out a disappointed moan. "Don't worry, I've got a sexier idea," she said before pushing Jenna on her back. Jenna gasped as she rolled onto her back trees were crushed beneath her massive body as Julia got down in between Jenna's now much plumper legs.

The rubber wolf girl went to work huffing and puffing as wolves were known to do. She blew and blew and blew into the squirming dragon girl. Jenna cried out lustfully as she only grew hornier and hornier with each blow into her pussy. She rocked back and forth rubbing herself against Julia's snout. The wolf balloon chewed her lip this had always been a fantasy of the meek silver-haired scientist.

Now she was living it out as a massive sexy balloon furry. She knew she would hear about this later, but for now she didn't care. She just kept blowing into her newfound lovers' sex. Jenna's arm and legs were soon engulfed by her expanding body. The once blond had become so wrapped up in the pleasure of being blown up, she hadn't noticed she was turning into a massive ball.

Though being a ball didn't bother her at all, she loved this feeling of getting bigger "more! Keep blowing! I want to be bigger!" Her hands flapped helplessly; her feet wiggled. Jenna was completely at the mercy of her mystery lover and she never felt kinkier or sexier than right now. "Ohhh keep pumping me up! I don't care how big you make me! I want to be bigger and hornier!"

Jenna still rocked back and forth her massive tits and ass cheeks the only distinguishable things on her now. Still, as her shadow loomed longer and longer over the landmass finally things started to slow down. She was getting tighter and tighter with every breath from Julia. Her breasts started to creak; her ass cheeks started to groan. Her whole body was now only inching bigger as more and more air was stuffed into her round body.

"Unnnnggghhhh so tight, but every breath makes me hornier! More! Tighter! Bigger! Don't stop! Don't stop!" Jenna was vibrating all over now her plastic skin was see-through still she wanted more "Yes! Tighter! Tighter! TIGHT!" Jenna screamed in pleasure as her gigantic round blimp body finally burst.

Julia was tossed backward by the blast. Letting out a grunt as she hit the ground Julia bounced along until she came to a stop. Getting up she quickly made her way back over to where the other woman had been. Looking down Julia could see a blond-haired, naked, woman sleeping soundly on the ground. Scooping up the unconscious girl Julia made her way back to the facility.

Jenna came to hours later. She was told quite firmly by Ms. O'Brien that this incident was to be kept quiet. If she agreed to sign a nondisclosure contract, she would be paid well for signing it. Jenna had never seen so much money on a cheque before she wasted no time in signing it. She later found out that the other woman who had blown her up was, in fact, the same person who made the gas in the first place.

Julia was the next person to talk to Jenna. She thanked Jenna for testing the gas and asked if she was looking for a new job. Julia would need a new lab assistant. As well as someone who would be equally as eager to test out Julia's new inventions as much as Julia herself. In the run of one-night Jenna went from a down on her luck custodial worker. To blown up like a massive parade balloon. To rich and now being offered a new job. Jenna smiled at Julia and held out her hand "so, when do I start?"

The End.