Underground City by lg gibbs18
Summary:

Matt is a 16 year old put into a bunker after a virus wipes out most men on the planet. Matt now the last man in the bunker discovers he can change people around him. And soon he finds what caused the virus leaving him the only one that can fix it.


Categories: Growing Woman, Adventure, Growing/Shrinking Out of Clothes, Incest Characters: None
Growth: Amazon (7 ft. to 15 ft.)
Shrink: None
Size Roles: None
Warnings: Following story may contain inappropriate material for certain audiences
Challenges: None
Series: None
Chapters: 3 Completed: No Word count: 4414 Read: 19078 Published: August 20 2016 Updated: September 16 2016

1. Into the city by lg gibbs18

2. Day Off by lg gibbs18

3. The world above by lg gibbs18

Into the city by lg gibbs18

It was 1:20 am when Matt was woken up by his mother yelling at him to run to a nearby shelter where she worked. He quickly ran out of his room to see his father on the floor blood pouring out of his mouth Matt didn't have time to stop as his mother told him to keep running and to not stop no matter what he saw. He saw plenty of things that his mind didn't process at the time he witnessed dead bodies pile up in the streets by his house until he finally reached the place. the entrance was a large elevator meant to hold as many people as possible it moved up and down to the inside and back.

His mom came up behind him "No don't get in this line over here" she said directing Matt to a small door next to the elevator which she had a code for she pushed the buttons and the doors opened revealing a small clean bright room. A woman sat at a desk in a room Matt's mom knew the woman she talked to her Matt didn't pay attention to what they were saying but he noticed that she would occasionally point at him. After a few moment's of talking Matt's mom left and the lady at the desk started typing and focusing on her computer. After around a minuet Matt's mom returned with his sister she looked as panicked and disgusted as Matt did.

The woman and Matt's mom talked a little bit longer until the woman stood up "Could you to step into those tubes over there" she said as two tubes filled with scanners. Both Matt and his sister walked into the tubes once inside the doors on the tubes slammed shut and on the inside was a bright screen. After a few seconds of waiting the screen showed the sentence PLEASE REMOVE CLOTHES in bold letters feeling both feeling a bit uncomfortable with it they continued anyway. A bunch of tiny green lights all over the tube flashed at once and new words appeared on the screen MEASUREMENTS again in all bold letters underneath where what they were measured as 

Matthew Bradley 

Height: 5'10

Sex: Male 

Weight: 170 lbs

Age: 15 

Penis Size:7 in

Jessica Bradley

Height: 5'7

Sex: Female

Weight: 115 lbs

Age: 17 

Cup Size D


They Both felt invaded by the detail of these scans.

The screen showed another message MAKING CLOTHES followed by the sounds of machinery pumping above them for around 30 seconds until a small hole in the top of the tube dropped a black skintight outfit. The screen displayed a final message PUT ON CLOTHES AND PUSH BUTTON the message this time appeared with a small red button that said open. They both got dressed Matt getting out a few seconds faster than Jessica but they both noticed their mom was gone but the lady was still there. So Matt went to ask her where she went "Umm excuse me" Matt said getting the attention of the lady "Yes what do you need" she said a big smile on her face "Do you know where my mom went" he asked as politely as he could "Yes she had to go help out around the place for a bit but I'll help you get set up down here" she said walking over to an elevator.

Matt Jessica and the lady all got into the elevator once they were in and she had hit the button on the bottom she started searching for something in her pocket which she soon found. "Your mother said for you to drink this now" she said handing Matt a tiny bottle which he downed the contents of quickly "and for you to drink this and read this in a year" she said the same look of happiness on her face. The last part of that sentence shocked Jessica and Matt "Wait why would she give you something to give me in a year" Matt said hoping to get an answer "Oh she won't be back for a long time if ever she had to be moved to a different place" she said looking like that was normal. But before ether one had time to say anything they had reached their floor "So this entire floor is your's" she said showing them around a giant mansion she showed them each room in the place.

After she was done she went back into the elevator leaving the two alone "Welcome to the first day of the rest of our lives...I guess" Jessica said sounding upset "Well at least we have each other" Matt said hugging her "Yeah I guess we do" she said sounding happier and returning the hug.

A year eventually passed slowly Matt and Jessica moved between the main city and their house constantly. They started to realize things as time moved on there was no men besides Matt it was just women in the entire complex no men anywhere. Which made Matt a celebrity he had interviews for the city's television station and everybody knew his name he was happy down underground. And Jessica was just as happy as she got famous just by living with him she didn't even have to do anything and people still knew who she was.

But the hard part of the year rolled around it was 1:32 am on October 9th 2016. Matt stared at the bottle and the letter without wasting anymore time than he needed to he chugged down the contents of the bottle and opened the note. It was the first thing he saw from his mother since last year he started reading it he was shocked by what he saw."Matt by time you're reading this I've been shipped off to go finish one of the biggest things I've ever worked on and you and your sister are going to help me the thing you just drank was if it works my biggest accomplishment in about 20 minuets you will start to feel tired don't fight it once wake up you'll have the ability to change people by thinking about it try it on Jessica before you start doing it publicly if it works go to my lab in the mansion and on a table in the back of the room their is a number pad the code is 1803" after looking over the note again and again wondering how this could possibly be real before long he passed out.

Waking up in the morning he grabbed the note and headed into the kitchen as Jessica usually was around there in the mornings. Luckily for him she was there this morning and had just finished her coffee "Jess I need to talk to you" Made said as he grabbed the note from his pocket "Why what's up" she said looking confused. "I just did the thing mom asked me to a year ago" Matt said looking down into her eyes as serious as he ever has "W-what did you do" she said now getting scared "Read this" he said handing her the note. "O-oh m-my god do you think it works" she said her mind racing thinking about what she just read "Only one way to find out what do you want me to do" Matt asked readying his mind "Umm let's try something simple make me as tall as you" she said now looking excited. Matt thought of her being as tall as him within 3 seconds Jessica started to grow "O-oh m-m-y god...it's working" she said excited.

the growth stopped just a moment to late as the skin tight outfit split in two the bottom half falling to the ground revealing her panties which clung tightly to her enlarged body just as the top half of the outfit did. "Ok keep your calm we have something to do now then we can play with these new powers" Matt said as he walked to the lab and found the number pad put in the code and a safe opened up in floor in the middle of the room and inside was...

 

End Notes:

I hope you enjoyed my first story so far 

Day Off by lg gibbs18

A small tablet sat inside the safe with the words PUSH HERE TO START written boldly at the bottom. With a quick glance at his enlarged sister he pushed the button and with a flash their mother was on the screen. "I don't have much time but I wanted to leave you a message hopefully if all goes well you'll be here soon I just wanted to say I love you" the video stopped it seemed like she had more to say but it just cut off right there. A new message appeared on the screen WAIT ONE DAY AND INPUT THE CODE 9837 INTO PAD Matt stared deep into the pad Jessica stared at it too they both thought about the same thing when could they see their mother again.

"Now we need to find a way to waste a day shouldn't be to hard now" Matt said jokingly trying to lighten the mood "Yeah we should probably try out your powers some more" Jessica looked at him like she was still horrified. "Jess are you going to be ok" Matt said as he walked over to her still a bit shocked about being able to look her in the eyes without looking down "Y-yeah let's just do something else" she said walking out of the lab with Matt following. They sat in the living room and started talking about what to do next "Well...hmm how 'bout..." Matt rambled on puzzled as Jessica looked at her body it finally settled in how big she was and she loved it she loved being big and she wanted to be bigger. "Why don't you make me bigger" Jessica suggested "Hmm well I guess staying close until I learn how to do this right could be a good idea...ok how big" Matt said as he cleared his mind in preparation for her request "Umm...let's make me 6'5 something big but not too big" Jessica replied as Matt put the thoughts to work.

The growth started off just as last time as she slowly rose above Matt's head as her outfit got tighter and tighter. Once she reached 6'3 ripping sounds started coming from her clothes the top was the first to go revealing her bra which now wasn't good for much as her nipples showed through the tight bra. Once she had reached her final height of 6'5 the other clothes started to go her panties started to tear the sides broke with a loud snapping sound Jessica now held what was left of the panties covering the important bits. Matt now regaining focus on the real world realized what was going on as he ran trying to found something to put over her body.

He grabbed a blanket from a nearby couch he quickly draped the blanket over her body. "How do you feel" Matt asked taking a seat next to her again "I feel...so good" she said a look of pure happiness covering her face. "Are you sure you're fine thi-" Matt was cut off as Jessica started to talk "Yes I'm fine stop worrying I'll tell you if something is wrong" she said resting her body on Matt's lap. Matt looked at Jessica it was obvious to him how much bigger she was and that he did this he could change anything about her or anybody he wanted to.

They both sat on the couch her body cuddled into his lap as they sat and let time pass but not after not too long of a time there was a knock at their door. Jessica's face turned to one of panic which Matt noticed instantly "What's wrong" Matt said looking towards the door "Umm...well I invited some friends over yesterday" she was now looking at the door as well. Matt's face turned pale how could they explain her growing 10 inches in a night. "Well what do we do" Matt said his eyes now darting around the room thinking of what he could say. "Can we tell them what's going on maybe" Jessica said just as panicked as Matt "No we can't tell them anything involving what's going on with mom" Matt said a stern look in his face.

"Can we tell them you just randomly got these powers or something" Jessica suggested "Well not randomly...but I got them from what ever happened on the surface" Matt said solving their predicament. "Ok let's do this you ready" Matt said as he walked over to answer the door three girls were there one was 6'3 with C cups the second one was 5'5 with D cups and the third one was 4'10 with B cups. They walked inside and quickly saw the changed Jessica the tall one was the first to speak "You look...different" she said as Jessica giggled a tiny bit which the tall one noticed "What's so funn-" she was too shocked to speak Jessica stood up revealing how tall she was. "W-wha h-how" she was shocked as were the other girls the shortest one spoke up "Y-you're s-so big" she said realizing she was stomach level with her.


While still begging and pleading the tall girl noticed something she was getting taller "YES THANK YOU" she shouted at him as she looked and felt her new body. Her clothes went the same way as Jessica's ripping apart but she didn't stop there she kept growing bigger and bigger until Matt stopped her at 7'3 a full foot taller than she was before. Her clothes in pieces on the floor leaving her large naked body on display for everyone in the room "That feels so...good" she said now returning to Matt's lap her new body weighing him to the ground. "Thank you so much for this I'll return the favor soon" she said standing up with a wink letting her body rise to it's full amazonian height proud to show off her nude form her round butt the size of a volleyball and her breasts that fit perfectly onto her chest.

Matt continued to change the girls throughout the afternoon eventually nighttime rolled around and the girls were adamant to stay. Matt eventually gave in letting the girls stay the night at his house they each got settled into a guest room each started getting used to the changes that happened to their bodies the short one now 6'3 was having fun being tall now the big breasted one now 7'2 and the tall one now 8'5. Matt settled into his bed tired from his day but before he could go to sleep he heard footsteps in the hallway they were getting closer and closer until they stopped in front of his door. Before he could react his door opened revealing the tall girl who was ducking under his doorway "I told you earlier I would repay the favor" she whispered shunting the door as she walked over to his bed "What are you doing" Matt said confused. "Don't lie you know why I'm here" she said Matt realized what she meant almost instantly after that "Umm" was the only thing he could say as her giant frame slid onto his bed.

Her body was huge next to Matt's average size she was almost twice his size and he could tell that she liked being this size. And Matt liked the idea of what was going to happen next which caused his penis to slowly rise to a full erect potion which she noticed instantly "Good you do know why I'm here" she said giggling a bit. "Umm...yeah" Matt was still uncomfortable with this but she wasn't she grabbed his underwear and started to pull them off letting his large penis free. She moved to look Matt in the face "Thanks for this" she said as she slid off the bed.

Her large hands wrapped around his penis as she started to prep him for what's to come. Everything she did felt amazing to Matt it was so forceful yet soft and gentle it was the best he'd ever felt and now it was time for them main course as she climbed above the bed placing her butt above his penis. and she pushed down hard on it they both loved what they felt they continued as she pushed her self onto him again and again each push put them closer to the tipping point. It wasn't more than a few more pushes that Matt hit the boiling point and let it all fly out as a loud moan of pleasure left her mouth the bed could barley handle the pressure that was caused.

"That was so great" she said as she cuddled her large body against Matt "Yeah that was amazing" Matt said letting the warmness of her large body envelop him. they both soon after fell asleep in what felt like no time at all for him Matt heard his alarm let out a loud ring waking them both up. "You made my night so much better" Matt said as he put on his clothes "You too" she said rolling out of his bed and walking towards the door "See ya downstairs" she said kissing the top of his head as she left. Matt soon followed down stairs on the kitchen where all the girls were gathered eating breakfast and waking up Matt thought of the day ahead of him he looked the hallway and remembered he had to go do more things for his mom so he walked back to the lab again and pushed in the code this time a screen popped out of a nearby wall on the screen he saw a room coated in a cold steel the floors covered in desks and science equipment and suddenly someone popped onto the screen.

The world above by lg gibbs18

Matt looked at the screen it was his mother again with more instructions but something caught his ears "We're dispatching a high speed train to the facility once you give us the signal". Matt's heart almost stopped after hearing that he would finally get some answers and get to see his mother once again these thoughts crossed his mind until he heard the opening of the door behind him. It was the tall girl she walked in "Where were you I thought you were coming down" she pouted Matt was still lost in thought and couldn't care what she was saying "I have to go somewhere" Matt said as he ran off to the kitchen.

Jessica sat in the kitchen drinking her friends sat nearby chatting about their new bodies until a voice pierced the silence "Jess we need to leave now" Matt said as the tall girl followed closely behind trying to ask questions but getting shushed by Matt "Why wha-" Matt shushed her too. "No time to explain just follow me" Matt said running again this time everybody in the house following Matt ran to the front yard to a tree that hid another number pad Matt put in a code. This code revealed something huge the ground shook as a hole slowly started appearing in the yard a stair case slowly showed itself in around a minute the hole fully opened leaving a stair case into a tunnel. Inside the tunnel were train tracks made specially for a prototype high speed train.

Matt typed somethings into a panel as everybody else took a seat in the nearby waiting area "Jess what's going on" the short one asked "Well why do you think I'd know I'm as confused as you are" Jess said as Matt walked in and sat next to Jessica. "You need to give us some answers" the tall one said "Ok let me fill you in" Matt gave up his lie and told them what was going on "So what answers do you think she'll have" the tall one asked "I don't know but I hope they're good ones" Matt said now as the train pulled up. They all walked into the train it was a small train with a lot of windows the inside of it had only a few seats and was driven by a robot which soon after all of them got on started the train out of the tunnel into the outside world. The world was not how they remembered it the sky was filled with dust and ash buildings were destroyed and bands of people with guns roamed the streets killing and looting "W-what h-happened" Jessica said shocked at the sights below.

"It looks like a war zone down there" Matt said looking at the environment. They soon reached where they were going a military base the train let them off into the base it was surprisingly calm compared to what they had just seen. Once they had left the train they saw a woman in a lab coat waving for them to go to her so they did they woman was shocked at the size of the women behind Matt. She explained she worked with his mother "Ok you I need you to drink this" the woman said handing Matt another bottle "here take this too it's an explanation that you need to understand your power" she said as she walked away. 

But before she walked away she directed Matt and everybody with him to a large building where they were directed to rooms they were very small and very cramped. Matt got assigned a room with his sister which was kind of weird for him as there was only one bed in the room. They two siblings both sat on a side of the bed it was silent in the room they both sat and thought until Jessica started to talk "So what now" she said looking at her brother "Now I guess we wait until something happens" Matt said turning to face her "Come on cheer up" Jessica said trying to lighten the mood as Matt seemed more sad then usual. "Yeah I guess I should... let's do something" Matt said looking at the paper the lady gave him "Why don't we read this together it'll give me the answers we came here looking for" Matt said looking at the paper covered in labeled sections.

Matt started reading the section that caught his eyes first it was about what the newest drink did. He skimmed through the first paragraph looking at the important bits "The thing I drink out there was to give me better control over things besides size" Matt told Jessica "So you want to try the stuff on me again" she asked "Sure why not what do you want" Matt said preparing himself once again. "Why don't you make these things a bit bigger" she said pointing towards her breasts "Umm o-ok" Matt said feeling a bit uncomfortable at her request but he still continued. He focused his mind on making her breasts a cup size bigger which they did fast through the blanket she had tied around her her breasts became more defined her nipples poked through and the chest area pushed and strained the blanket.

Her face showed pleasure which made Matt more uncomfortable. He ignored the soft moans she let out and continued reading he found something talking about the side affects of the new drink one caught his eye "Use may cause recipient's sex drive to increase causing increased need for sex and sexual pleasure" after reading this Matt glanced over at his sister. She had rolled onto the floor and tossed her blanket onto the bed her large body now laid naked on the floor as she played with her new breasts as moans of pleasure left her mouth getting louder and louder. Matt couldn't move his body was confused a hot girl that was laying on his floor wanting nothing more than sex but that hot girl was his sister, he stood up and ran for the door.

He slapped himself in face for even thinking that. He sat outside and decided to read some more of the paper. But he didn't pay much attention his brain was focused on what just happened every detail no matter how much he tried to stop he couldn't why would he even think that his primal urges almost got him in to trouble. Matt could hear the noises stop in the room so he went in Jessica was wrapped in her blanket again she looked like she had realized what she had done.

"I-I don't know what happened I just lost control" she said sadly "You don't need to feel bad it's my fault" Matt said comforting her "It's that new thing I drank it makes people not be able to control that" he continued. "You knew that and you still did that" the sadness faded from her face and turned to anger "I didn't at the time" he said now trying to calm her down "HOW DIDN'T YOU KNOW THIS IS YOUR POWER" she started yelling "Just listen and I can-" she cut him off "NO SHUT UP" as she continued to yell "let me explain this-" she wasn't in the mood to listen to anything he had to say. Matt kept trying to explain but she wasn't listening and was just getting angrier and angrier "I SAID SHUT UP" she said kicking Matt in to a chair which he fell over and in to a wall. He was knocked unconscious and was bleeding heavily "W-what did I do" she said as she now looked at his body that was gushing blood from the back of his head.

Matt woke up from what felt like the worst nightmare he had ever had but it was over now it was another sunny day and he wasn't underground or in a military base he was home. But something felt different everything felt different but he just shrugged it off and continued his morning. His house was quieter than it usually was at this time in the morning and it was emptier all of the doors in the house except for his were gone "What the hell" he said looking in each room and each one was as empty as the last. He continued into his kitchen where the silence was broken loud thumps followed by shaking filled the house each thump getting closer and closer to his house until the stopped directly outside the house "What's happening" Matt said now panicked as the roof of his house started coming off once it did it revealed the cause of the noise his sister only now 200 feet tall.

 

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