Disclaimer: All publicly recognizable characters, settings, etc. are the property of their respective owners. The original characters and plot are the property of the author. The author is in no way associated with the owners, creators, or producers of any media franchise. No copyright infringement is intended.


Matt stepped off the airplane, into Gregson City Airport. Following behind him were several of his classmates.

Matt was 18 years old. He was very smart yet a bit shy. He stood tall at 6', but he was a bit skinny, weighing a measly 140 lbs.. He had dirty blonde hair as well.

Behind him was his girlfriend, Katie. She was younger than him, but still 18. She was 5'8", and had a fit body, weighing at 160 lbs., as well as nice, perky B-Cup Breasts. She had dirty blonde hair as well, that went down to her hips. She was kind and playful.

Right after Katie was another girl, Cynthia. Cynthia was 6 feet tall, weighed around 180 lbs., and had big D-Cup breasts. She was 18 as well, and had long, luscious black hair that went down to her curvy butt. She had somewhat of a sex drive, and for some reasons unknown to some of the others, seemed attracted to Matt.

And behind her was Laura. She was, of course, 18 too. She was 5'6" and was a bit skinnier, only 140 lbs., and had C-Cup breasts. She had blonde hair. She seemed normal on the surface, but she had some lustful fantasies about growing with a partner.

Matt was amazed that he was able to go on this trip in the first place. It was a trip sponsored by his high school. But for some reason, all of the people who signed up, except for Matt, were female! Since they were all 18, though, the school thought that Matt would be responsible enough sleeping in a hotel room with 3 other girls.

Soon they arrived at their hotel. Before they headed up to their rooms, Matt decided to check out a shop in the lobby. There was a knickknack shop, and Matt found this weird map of the city, with a trail leading to a point outside the city, that was labelled "Muscle Growth Shrine". The owner of the shop walked over.

"Heh, that's some bizarre map. There was some rumor that if you find this shrine, and make a non-human sacrifice to the green flames, you'll be granted some muscle growth, but I don't believe in any of that bull. You can take the map if you want." the owner said.

Matt nodded, and headed up to his room where the girls were waiting. It was late, so the girls were getting ready for bed. Matt looked and saw Katie and Laura.

"Hey, where's Cynthia?" Matt asked.

"Oh, she's just changing into some night clothes." Katie said.

The bathroom door opened, and Matt turned to see Cynthia wearing a white t-shirt with her nipples poking through the fabric, and wearing only pink panties down below.

"Uh... Cynthia? Why aren't you wearing a bra?" Matt asked.

"Pfft. I'm perfectly fine without one. And besides, it feels better without it constricting my breasts. And they were getting a little big for it, anyways." Cynthia responded.

"Well, anyways, I found this map that leads to this "Muscle Growth Shrine". I think we should check it out in the morning!" Matt commented.

"Ooh, that sounds really nice!" Laura responded, starting to fantasize in her head.

Matt headed to his bed that he was sharing with Katie. Going through his luggage, he realized that he forgot his gym shorts.

"Hey, Matt, did you forget your sleeping shorts?" Katie asked.

"Hey, Matt, it's totally fine if you sleep in just your boxers!" Cynthia said with a wink.

Matt just sighed, taking off his shorts. Laura's eyes widened at noticing his bulge. After a few lustful looks from all the girls, Matt decided to just go to sleep...

The next morning, after travelling through the woods outside Gregson City for about an hour, Matt felt like they were getting close.

"Ugh... why did we have to do this, Matt? I'm tired out... how will we get back?" Cynthia complained.

"Look, if this works like I think it will, then we won't have anything to worry about." Matt responded.

Cynthia just groaned as they walked. Within another half hour, they had finally arrived at the shrine! Stepping inside, they found a giant green flame at an altar.

"Uh... I'll go last. Who wants to go first?" Matt said.

"Me! I'd love to! But... how should I do this sacrifice thingy?" Laura asked.

"Well, uh, take something and throw it in the fire..." Katie suggested.

Laura just shrugged, and then took off her shirt, revealing her purple bra. Tossing her shirt in the fire, she waited.

"Huh. Nothing..." Laura said in disappointment.

"Did you really have to take your shirt off?" Matt asked.

"What, do you have a problem with me being in only my bra and short shorts?" Laura asked.

"Well... uh... wait, are your breasts getting bigger?" Matt responded.

Looking at herself, Laura started to realize that she was indeed growing, her breasts pushing on her bra. Her biceps started to grow, and she flexed them happily, her muscle as big as a baseball, and getting bigger. Her breasts passed the D-Cup size, starting to cause her bra to start to tear. Her abs became a six pack, and then her legs started to get thicker and more toned, as well as giving her a nice butt that was starting to stretch her short shorts. She was also getting taller as well; this started causing her short shorts to tear down the middle some, revealing her panties.

Elated, Laura started doing various poses, admiring her new muscles. Smirking, she walked over to Matt; she was as tall as he was! She started picking him up, much to his dismay. She had relative ease, and gave Matt a good view of her breasts.

"Wow, you're so light! Dang, I feel so strong!" Laura commented.

"Well, now it's my turn!" Cynthia remarked.

She took off her t-shirt, revealing her big boobs in her bra. Even though she hasn't actually done any growth yet, her bra looked tight on her. She then took off her pants, leaving her in her black, lacy underwear.

"You're taking your clothes off too?" Matt groaned.

"Well, yeah, I mean, with how big a shirt made Laura, I'd like to see what it would do if I threw in my pants as well!" Cynthia said, smiling.

She threw in her clothes, and then waited. After waiting a good minute or so, she suddenly felt very aroused. Looking at her legs, she saw them start to gain muscle mass, getting larger and thicker, until her legs were as thick as telephone poles, and very toned. Her butt grew some too, causing her panties to tear at the front, revealing a bit more skin. Her abs became an eight-pack, and with her increasing height, each one was about half the size of a brick. Then her pecs and breasts began to grow; almost immediately a lot of strands on her bra snapped, and as her boobs passed watermelons in size, nearing beach balls, it was hanging on by a thread. Last was her arms; growing huge, her arms grew so muscular that they were thicker than her legs used to be. Flexing her bicep, she was delighted to find a bump twice as big as Laura's. She grew more, her panties almost torn to the point where her panties didn't cover her vagina anymore. Cynthia was now 7 feet tall!

"Wow... that was amazing! I'm like a huge amazon now!" Cynthia commented.

"Uh... Cynthia? Your... underwear... it's... pretty much falling off..." Matt said.

"Well, this much sexiness deserves to be revealed as much as possible! Let me see how strong I am!" Cynthia responded.

Walking outside, she put her hands around a tree, and tried pulling up. She grunted and had to use a bit of effort, but slowly and surely, she lifted up the tree, uprooting it!

"Gee, I should throw this in the fire! I'd be a goddess!" Cynthia remarked.

Katie was excited, it was now her turn.