Chapter 1: Presentation and Experimentation
By Clone26

Welcome to my first attempt at writing RWBY fan fiction. I figured I would start off with a bang and make something super smutty. If any level of body modification (for example; breast expansion or clit growth) isn't your thing, I suggest you leave and purge this story from your memory.

Edit: I edited this chapter to more clearly define where this story fits into the timeline of RWBY itself as well as several other small revisions. [Dec. 2nd, 2015.]

Also: Character tags and content warnings for this specific chapter

Characters: Weiss, Winter

Contains: Story setup, Light breast expansion

Weiss Schnee walked through the halls of Beacon's VIP dormitories. Several minutes ago she received a message from her older sister, Winter, while practicing with her semblance in the garden and she was now headed to the room where she would be staying during her visit to Beacon. The message was nothing more than a short and to the point "Meet me in my room as soon as is convenient.". Nothing too unusual coming from her sister, but it did leave her worried about what might be wrong.

As Weiss is walking through the halls she spotted two armed AK-200 androids standing guard outside one of the rooms.

"This must be her room then." Weiss thought to herself.

As she approached the guards they stepped closer together and took up a more defensive stance, blocking her passage to the door. Weiss glared at the robots. "My name is Weiss Schnee," she asserted, "My sister has demanded my presence, please let me enter."

"Negative," the robot on the left responded, "Specialist Schnee has requested complete privacy for the rest of the evening."

"What?! I am her sister!" the short girl exclaimed. Before she could continue to yell at the guards for refusing her entrance, the door opened. Surveying the situation, Winter addressed the guards. "Stand down." She sternly ordered, "My sister, Weiss, may have access my accommodations. Maintain orders to let nobody else enter."

As Weiss followed her sister into the room she noticed several cases of lightly colored dust resting on her bed. She decided not to ask about it, assuming it to be some new dust compounds that her father's researchers were testing, knowing she would quickly learn about them if trials were successful anyway. The older woman's voice tore her thoughts away from that and back to the present.

"Thank you for arriving so soon." Winter said as she closed and locked the door. "I apologize for the extra security, but what I have to discuss with you is a very surreptitious topic."

"It's fine," Weiss responded, "What is it that you wanted to discuss?"

"First, what do you know about dust?"

"Well, it's used to power most mechanical devices. It can be used to-"

"No. What do you know about Dust itself, not its uses."

"Oh, sorry. Dust primarily occurs naturally in crystal form as either Burn, Aqua, Bolt, or Wind. These primary types can then be artificially combined together to create various other alternate forms of dust. All of which can be activated by a living creature's aura."

"Enough." Winter halted her, smiling, "That is correct." She walks over to the cases of dust sitting on her bed. "And, as you no doubt know, our family's company is continuously researching and experimenting on dust to discover and create new unique forms that can be used to improve our lives, or expand their profits."

"These vials," Winter gestured to the cases containing small flasks of dust, all of various pastel colors, "Are the newest samples from the Medical branch of the Schnee Labs. They have been experimenting with ways to enhance the human body beyond what Aura alone can do. To create the next generation of Super-human Specialists."

"What does this have to do with me?" Weiss asked calmly, trying to hide her nervousness at the idea of infusing her body with such a Dust.

Winter looked somewhat amused at the question, "I would like you to participate in the exclusive clinical trials for me, so that I may record the results."

"And it's safe?" Weiss asked as her sister handed her a small, closed, case only large enough to hold two or three of the small vials.

"Completely." Winter assured, "Simply follow the instructions on the label of the vial and you should run no risk of harm."

"Alright, I'll do it." Weiss spoke with feigned confidence as she took the case and proceeded to exit the room.

"One more thing," Winter said before she could open the door, "These samples and our involvement in the trials is classified. Noone else is to know of this. So try not to overdo it. You still need to participate in a public tournament after all."

"Understood." Weiss said before finally leaving and heading back to her dorm.

"Good." Winter thought to herself as she smiled.

Weiss stood in the bathroom of team RWBY's dorm, standing half naked in front of the mirror. She looked at her tiny chest, at how her little mounds only extended a fraction of an inch from her rib cage. Her only article of clothing being a pair of plain white panties, her nightgown was neatly folded and resting nearby on the counter. The case she received from Winter was sitting on the counter top. The Schnee logo was imprinted in the center of the rather small and flat rectangular box.

The rest of her team was on their way to the cafeteria to enjoy dinner after a long day. Weiss opted to stay behind. She told her team that she would be taking a shower and that they could bring her something to eat when they came back to the dorm. Of course, the real reason she chose to stay behind was so that she could finally take a look at this new Dust her sister had given her.

Unlatching the case and lifting the lid Weiss saw 3 things inside. On the far left was a glass vial with an oddly shaped nozzle on the top and what appeared to be a light orange colored Dust inside. There appeared to be no way for her to open the container with just her bare hands. To the right of that was another vial with a mostly clear foggy white liquid, with a much simpler screw-on cap. Finally, in the far right of the case was something that almost looked like a tiny gun or syringe, but the tip was too wide and flat to penetrate skin.

Curiously picking up the white liquid first, she read the label. The label had several things marked over in thick black. What she could read included 'Schnee Medical Laboratory' and 'Counteracting Agent'. Apparently some sort of antidote for whatever the dust is supposed to do.

Next she picked up the dust vial and started reading the label. She read the rather interesting name and wondered out loud "Supple? Who would name a dust something as silly as that?". Written immediately under the words 'Test Sample' was the instruction to 'Take one dose per day until desired size is met'.

"Desired size?" Weiss questioned to herself, "Is Winter trying to give me a larger muscle mass? Or perhaps she's trying to make me taller?" Weiss scoffed at the thought of that second idea, "Well, she did say something about super-humans..."

She continued to read the warnings and instructions. 'WARNING: Do not apply to any area of the body other than instructed. Side effects undocumented.' "I'll have to be careful then." Weiss continued onto the usage instructions. '1. Use provided applicator-' "I guess that's what this syringe-like thing is." '-to evenly apply one dose to each breast.'

"What." Weiss said out loud, shocked by what she just read. She read it again, just to be sure. "My sister is trying to give me bigger breasts?!"

"I- I'll just give it a try. I suppose I have been envious of girls with breasts larger than mine, especially Yang." Weiss reasoned to herself.

She continued reading the instructions, '2. Locally activate aura until all applied dust is absorbed into the body. 3. Wait 5 to 10 minutes for dust to take effect.' As well as some fine print at the bottom, 'If any dust makes contact with the body anywhere other than intended area, do not activate aura and wash off with clean water. Current studies show effects can last for a few days, weeks, or permanently or until counteracting agent is applied.'

"Okay. This sounds reasonable enough I suppose." Weiss said, reassuring herself, "At least she gave me the antidote too, so it's not as if I'm being forced with no way to change them back."

Finally, Weiss retrieved the applicator from the case. Seeing a small label on the side, she decided it would be good to be cautious and read it. '"Supple" Dust Applicator: Holds a maximum of 1 dose of "Supple" Dust' "I suppose that simplifies things.".

After inspecting the device for a short time she finds a small hole on the bottom of the grip that looks like it fits onto the dust vial's nozzle.

Placing the grip on top of the nozzle, the small reservoir in the grip of the applicator quickly filled with the orange dust. She lifts the nozzle of the applicator up to her right breast and begins to apply the somewhat sticky and slightly cold substance all over it, until it is covered in a thick and even coating of the stuff. She supposed the dose was meant to be able to cover much larger chests, but the warnings didn't mention anything about their starting size so it must have been fine. She quickly refilled the device and applied a layer to her left breast as well.

As per instruction, she channeled her aura into her chest. She closed her eyes, not wanting to watch as she willingly infused dust into her own breasts. Soon she began to feel a warm and pleasant feeling in her breasts, but nothing overwhelming.

Immediately after, she opened her eyes to check that all the dust had been absorbed and to see if her breasts had gotten any larger. While all of the orange dust had indeed been absorbed into her skin, there was no other visible change and her chest had gone back to feeling mostly normal, if slightly more warm, but that could have simply been from no longer having the chilly dust on her skin.

After a few minutes of boredly watching her breasts in the mirror Weiss started to feel the warm and pleasing sensation again, along with a new tight feeling just under her skin. She began to intently watch her chest in the mirror all while the feeling in her breasts grew more and more delightful. Soon she saw her nearly flat bumps ever so slightly swell and the feeling became more intense as she stumbled and bent down to sit on the toilet for support. Her breasts continued to stretch and grow, while the feeling in her chest brought her nearly to the brink of orgasm.

And then it stopped. Weiss sat on the toilet seat panting, unsatisfied. She had been scared it would hurt, not even considering it might feel as pleasant as it was. Her breasts were now almost as large as Blake's.

Slowly standing up, still breathing in gasps, she gathered the dust and applicator and put them back in the case with the antidote. She then closed and re-latched the container. In her unthinking state she decided to hide it behind some of her other things in the medicine cabinet, hoping perhaps the others would just confuse it for an expensive makeup case and think nothing of it. She quickly donned her nightgown, the garment now riding slightly higher than it had before, nearly exposing her underwear.

Weiss slowly returned to the bedroom to rest face-down on her bunk before the others returned with her dinner, hoping they wouldn't notice the increase in size.

A week passed and and the Vytal Festival Tournament came to an end. Weiss and Yang easily won their doubles match and Yang went on to the final singles match. Unfortunately Yang seemed distracted by something on the day of the final match and the trophy went to some no-name team from Haven. RWBY was awarded a smaller silver trophy for their efforts though, which was nice.

During the week Weiss had only decided to make her breasts larger once more, a few days after the first time. She didn't want them to become too difficult to move with during the tournament. Now they were about the same size as Blake's moderately sized bumps, although they looked significantly larger on Weiss's smaller frame.

She seems to have done a good job of keeping the secret. Every time she's checked on the case in the medicine cabinet it is unmoved from where she left it, and none of her teammates have made any comments about a strange case in the medicine cabinet or about her chest.

Of course, her team had noticed. It's a difficult thing to hide from people she shared company with nearly 24/7, after all. A change like that happening so quickly. Ruby decided she liked Weiss's boobs like this, though she now gets more nervous and red-faced around her than before. Blake had taken notice, but not much more than that, preferring to keep to herself and deciding that a change in Weiss's cup size hardly mattered to her. Yang, on the other hand, very much did not like Weiss's rapidly growing assets.

Yang took pride in having the largest chest among her group of friends, though she viewed Pyrrha as a worthy adversary as 2nd best. Weiss, however, was not worthy of such a large chest in her eyes. Weiss recently grew to a size between her own and Blake's and by Yang's predictions wouldn't take much longer to surpass even her. And that was something she could not stand for. She had even noticed them bouncing around while they fought together in their match. The ice queen's tiny mounds weren't supposed to bounce!

Late that night, when the others had gone to sleep, Yang quietly infiltrated the bathroom to look for anything Weiss might be keeping in one of her makeup bags and cases that Weiss might be using to give herself bigger tits. Looking through the cabinets and drawers Yang couldn't find anything out of the ordinary. Just normal makeup, shampoos, soap, toothpaste, and other toiletries.

The last place she could possibly look was the medicine cabinet behind the mirror. Opening it she again saw nothing weird. Just some razors, aspirin, an extra tube of toothpaste, some allergy medicine- oh, that's new. In the bottom right corner behind a bottle of mouthwash and some deodorant she saw a box with the Schnee logo on it.

After pulling the case out of the cabinet she sat it down on the counter and opened it up. Inside she saw a couple of small jars and some syringe-looking thing. Not knowing what any of it was, she picked up the first vial and began to read the label.

"Jackpot." Yang said quietly.

Thank you for reading the first chapter of my first story!
Rather heavy on plot and light on smut, I know, but we'll get to more of that later on. I just like my porn to have a little substance behind it, make the sex feel more worth it than just mindless fucking or lonely bored masturbating.

Also this story marks my first time writing anything sexual (at least with the intent of strangers reading it).

At the start of this story Weiss has no interest in Neptune, or anybody else for that matter, Ruby has a crush on Weiss, and Blake and Yang are together.

Fun fact: Originally (before the edits) this chapter had exactly 2,266 words in it. That's, like, double the number at the end of my name!