"Chiyo- what are those?!" cried Tomo as she spotted Chiyo getting changed from her school uniform to her swimsuit in the locker room. Chiyo stopped undressing and turned to Tomo, a questioning look on her face.

"Wha?"

"Umm….you…..never mind-good luck getting into that!"

Tomo turned from Chiyo and continued undressing, leaving Chiyo to wonder what she meant.

She finished changing into her swimsuit, and when it was on it felt like it was crushing her.

She began to walk out to the pool to see Nyamo, their gym teacher, waiting for the class. Chiyo was the first out. As she waved to Nyamo, she felt the pressure from the bathing suit lessen. Nyamo's face changed a bit, as if trying to hold back shock.

Chiyo looked down and turned bright scarlet- her breasts had actually popped out of the top of the swimsuit, as they were bigger than what the suit usually faced. Nyamo quickly escorted Chiyo to her office before the rest of the girls emerged.

Chiyo was released a bit later in her school uniform, still in a perpetual blush, even her T-shirt seeming to be too tight.

The next day Chiyo came into school with a training bra and a determination to never let something like that happen again.

Tomo sat in the cafeteria, grabbing another carton of milk to go with her third helping of breakfast. After seeing that Chiyo had developed breasts bigger than hers in the time span of one school vacation, she was determined not to be upstaged. She pushed her chair away from the lunch table- she couldn't eat another bite, her small stomach bulging out with only a little bit of excess food. Looks like she was going shopping.

The next week flew by, and Chiyo was beginning to forget her earlier troubles until Tomo walked in with a grin. She went up to Chiyo and grinned. Her breasts were now pushing at her uniform's shirt, and it looked like they had shot up a cup size, most of it over the weekend. Chiyo realized what Tomo's earlier comments were about, and blushed.

"I win!" exclaimed Tomo, unaware that Chiyo had been treating her new curves as if they something to be ashamed of. Chiyo was going to say something but, Tomo already departed.

Tomo went to her locker and took her new herbal supplement from it. She went to the cafeteria, took the pill, and proceeded to eat three times what she usually ate, eager to get more estrogen flowing in her body and further enhance her bust. She finally was going to have a body like Sakaki!

Chiyo hoped Tomo would forget this silly little game in time, but things only got worse. In gym a few days later, Chiyo was now undressing from a full fledged bra ( B and a half cup) and had a larger swimsuit. The actual class went fine, but Tomo watched in horror as Chiyo's soft, plump breasts snapped her bra when she got dressed again, showing the need for a C cup and once again passing Tomo, who was not only a cup size bigger than a week ago but about 10 pounds heaver. She wiggled into her panties and had a struggle with her skirt now that her hips were meatier.

The next gym class Tomo was beaming. She had gone up another half cup, now a C and a half- she needed a bigger swimsuit, both for her breasts- and her belly and rear. She had put on another twenty pounds, and was growing a fine double chin. Her stomach was soft and her legs soft and unfit, but she didn't notice all that much.

What Tomo did notice was Chiyo walking past her with Sakaki, wearing one of her bras. Somehow the herbal supplement hadn't increased her appetite enough to house the food needed to keep up with Chiyo.

Sakaki watched Chiyo's breasts bounce along as they walked along. She reminded her of when she first had to cope with larger than normal breasts, and she was determined to make Chiyo feel comfortable with herself.

During a cooking class, Chiyo started preparing a very large cake for all of her friends- just as she spotted Osaka entering the room; she turned and knocked a sack of flour to the floor with her breasts, which were growing plumper by the day.

Meanwhile, Tomo poured the contents of 10 of her supplements into her cake mix, but knocked milk to the floor when she reached over to get some sugar. She grinned a bit looking down at her breasts, and crouched to clean up the milk, her stomach forming rolls and her breasts nearly ripping her uniform. Chiyo arose from her flour spill and continued mixing the cake- accidentally grabbing Tomo's bowl.

An hour later and the girls were all digging in to Chiyo's fresh new cake. They found that the cake was so good it made them hungry.

The girls ate more and more lunch as the days went by, and soon their gym class had a lot more tugging and pulling of clothing involved. Osaka stared blankly at Yomi who desperately did jumping jacks, her breasts doing massive jumps with her and her stomach shaking slightly with her newfound weight.

Osaka had a similar incident as Chiyo's with her swimsuit. As Osaka ran up to Chiyo in the pool, her breasts actually ripped the swimsuit and her belly tore a massive hole that eventually joined with the one made by her breasts.

Tomo slowly realized what must have happened and had a bit of a desperate idea. She had put out a lot of weight due to the supplement, and it was beginning to become hard to hide- she now had a very full double chin and her belly was soft and beginning to hang. Perhaps if she gave the supplement to the rest of the girls, she wouldn't be the fat hog of the group….

The next week Chiyo and Sakaki needed new wardrobes, as their rears had become just as soft and squishy has their chests, and Sakaki's hips were now becoming too much for any of her clothes to handle. Chiyo was in the process of becoming a butterball, her face chubbing out considerably and her whole frame getting rounder, her stomach now ending her hope of seeing her feet if she managed to move her breasts far apart enough before they squished back. The only good thing was Chiyo's belly helped with her balance issues that came with her newfound endowments.

As the weeks progressed, Tomo was pleased to find that she was not being made fun of at all, which was good- she had developed quite a strong addiction to the supplement, and she figured she would keep up giving the supplement to her friends, until they were nice and hooked, then they would be squared out and ready to put this whole thing behind them.

-2 weeks later-

"Sakaki- could you help me up?" Chiyo's 300 pound frame made it difficult for her to get up on her own after she had sat down onto the mound of jelly that was her rear. Kagura had quit all of her sports teams and grew a giant stomach. Osaka's thighs were massive, and even her new skirt wasn't enough to keep the bottom of her rear from poking out. Sakaki was a massive hourglass shape, and her breasts and rear were gigantic, both quivering as she waddled. Tomo enjoyed laying around a lot, mostly because walking was getting annoying for her. She was a well- rounded 400 pounds, and still enjoyed a good candy bar despite her weight.

Tomo figured it was wrong to start something like this, but everyone seemed happy enough, and even the teachers thought it would be best if they had a second lunch period instead of a gym class after a little convincing. (convincing being a few supplement pills in a coffee cup)

After all, its not like things can get any worse with time.