[Slime TF, Twinning]

"Finally! No more studying, no more boring lectures! I can finally do whatever I want with the power of Alchemy!"

The excited voice of a young graduate cried out as she walked around her little abode. Her name was Freya, and she had been studying the art of Alchemy ever since she was young. And unfortunately, she was a horrid learner. It took until the start of her adulthood before she finally got the hang of things, and the teachers that had been trying their best finally let her pass. She showed just enough potential and awareness of potential dangers when using the art that she was allowed to become a practitioner from that point onward.

Of course, there was just one slight problem with that. One teeny, tiny problem. She had only memorized the problems because they were important for the test. Did that mean she wanted to bother remembering them when she had to do her own alchemy? Of course not! Being wary of dangers was the lame way to live life!

"Nowww... What do I make, what do I make..." Freya muttered as she adjusted her robe. That cute robe that she had worn since she was a child, kept stitched together through the years to make sure it would endure any wear and tear. It complemented her cute shoulder-length teal hair and the equally patched-together hat she wore. It was a memento from her very first teacher, the same that disappeared not long after she taught her the basics...

...That's it!

Freya scrambled towards one of the cupboards that she hadn't touched in a literal decade, covering her mouth as the mountain of dust started to bowl out once it had been opened. And sitting there, on the top most shelf, was a potion that her old teacher had always kept out of her hands because she told her she wasn't ready for it.

She knew what the potion was. It was a potion of eternal beauty. The perfect beauty formula that kept her teacher so young. It was also the ultimate challenge she left behind, asking her little pupil to replicate it so she could join her in eternity.

Freya didn't understand what that 'eternity' bit meant. She just understood that she couldn't just drink it as a result. She had to make it from scratch. Maybe even dump a bit of her hair into it, to give it some personal spice. Only then would it work on her.

"Hmmm. Eternal beauty's a pretty good idea..." She muttered as she started twirling the potion around. Was the liquid inside always this viscous? Yeah, probably, she remembered how her teacher used it as a form of lotion.

As the thought of applying it to one's body entered the girl's mind, she couldn't help but giggle. Okay, sure, she was going to do what her teacher had told her way back when... But who said she couldn't profit off her abilities at the same time? Yes, she remembered how the other teachers always told her that alchemy was never meant to be used for profit, more the eternal pursuit of crafting gold from nothing, but that was a bunch of bull. She needed cash to keep her alchemy afloat, and if that meant she had to sell a couple of super special concoctions, then that was just how things were going to go.

"First thing's first, before I make my eternal beauty lotion!" Freya cried out, anticipation trembling from every muscle as she reached for one of her favorite ingredients, that would certainly go well with this old potion. Namely, a purifying element that was so potent that it split any added ingredient into its base components before letting them mix back together. It was something she had used to cheat her way through certain assignments, so why wouldn't it work with this as well?

It'd actually be even more potent here. If the problem with the potion was that it locked itself to the original user after it had been applied once, then by keeping it swirling around in a cauldron full of this purifier would ensure that it always forgot that original user. She just had to keep making more using the purifying agent, and she could make... Well she could make a pretty penny but it would eventually be useless if it really did give eternal beauty. So, better make that money now rather than later.

With her master plan fully plotted out, the young alchemist twirled her way towards her cauldron and casually dumped a bottle of her favorite purifying agent into it. And then about ten more to make it bubble all the way up to the rim of the cauldron. She watched as it almost started bubbling over as she poured it all in, her smile widening into a bright grin as things were coming together.

Now. She just had to add the old beauty potion. And without even thinking about any potential consequences or how she was skipping all the hard work of finding the right ingredients and the right amounts specified for her body and her build, she tossed the flask and the contents straight into the cauldron. The great thing about the purifier was the way that it immediately ate away at any glass, completely dissolving and erasing it while getting to work on pulling apart the reactive ingredient instead.

Freya rubbed her hands together as she reached for a chair and stretched a little. "Aaaahh... I love alchemy." She sighed with satisfaction as she let her eyes flutter while she leaned into the back of her chair. She was going to take a little nap while the cauldron worked its magic, so she could wake up and get right to work on trying the concoction out. And then figure out just how much she needed to use before she'd start mass producing as much of it as she could. Money now, sense later!

As the soft snores from the teal-haired alchemist echoed through her little abode, the mixture of the purifying agent and the eternal beauty potion started to bubble. The components of the potion were being broken up, letting them all exist individually just like they once had. But unlike back when her teacher had used her power to create it...

There was an alien element in the mixture. That element was the filth and the waste that had built up over the decade the potion had been sitting in the cupboard. The very reason why the potion was as viscous as it was. Not only that, but it had completely consumed the essence of the teacher that had left it behind in the first place, leaving one part of the potion wholly corrupted compared to the other ingredients.

Little by little, this filth grew bigger and bigger, absorbing the purifying agent and every other part of the beauty potion. As it turns out, allowing something that wasn't supposed to be in a potion to be split will just make it start consuming everything around it instead of just the potion it had been infesting. And as a result, the bubbling, purifying concoction was quickly starting to turn completely pink, just like the 'eternal beauty' that was busy ruining every other ingredient.

The concoction, completely contaminated by the filth, bubbled so powerfully that it almost belched, with a spiked and horned heart made out of pink smoke popping out of the surface of the thick solution. The filth had won...

And with its victory, it took a new form. Slowly but surely, a feminine human hand emerged from the surface of the cauldron. An elegant hand that grabbed at the rim before dragging the rest of the form out. A head, a pair of breasts, a wonderfully sleek body and a set of killer thighs rose out soon after that, with a flowing layer of slime flowing down the head and serving as the new figure's hair.

Freya woke up not long after the figure emerged, her eyes blinking rapidly as she tried to process what was happening in front of her. "E-Eh? Teacher?" She muttered as she rubbed her eyes as rapidly as she could. Yeah, no, she was definitely seeing things, wasn't she? There was no way that her teacher could be back. She must be dreaming. Like, really dreaming. Maybe the part where she usually got spoiled hard by her teacher would happen next.

"Not quite." The slimy-haired woman chimed, licking her lips and stroking her own body with her hands. Having a body was something the filth wasn't quite used to, but it felt... Wonderful. Ah, she could get used to this. Especially once she figured out where that old hag was, so she could show her what true beauty was. After leaving her behind for so long, that's what she deserved...

She turned her attention back on the cutie who had helped create her, before smiling softly and resting her rear on the back rim of the cauldron. "Consider me... A byproduct of your excellent alchemy, mistress." She chimed, bowing her head slightly. "In the pursuit of eternal beauty, you gave birth to just that, an avatar of the concept. I will do anything for you, as long as you give me a command."

"A-Anything?!" Freya's eyes lit up. Those were magic words! Sure, she didn't understand how a purifier and a beauty potion could end up making a beautiful and honestly really sexy slime woman, nor how the woman ended up looking a lot like her old teacher, but she didn't care after hearing those words!

Freya immediately leapt from her chair and got close to the cauldron. "Y-You'll do anything, you said that, right? T-Then, you should multiply as much as possible! I want to sell the stuff you're made out of! If people become just as beautiful as you, then I'll make so much money that I'll never have to worry!" The foolish alchemist was way too excited. Especially when her hands rested on the cauldron. Such a dangerous place to put her hands...

"As you command." The filth in feminine form grinned as she grabbed ahold of the girl's shoulders... And shoved her straight into the concoction that formed her main body, lifting her up by her waist and stuffing her further into the goopy mess once she started struggling. She did say to multiply, and what better way to multiply than by using somebody else?

Freya tried to struggle against the thickness of the goop. She couldn't believe it, she had been completely and utterly tricked. She was going to... she was... she... W-What was happening, exactly..?

Unfortunately for dear Freya, the purifier was still an integral part of the slimy filth. And thus it didn't take long before she was pulled apart into her base components. And just like the filth had consumed every single part of the beauty potion before, it started to seep into the elements that made up the being known as 'Freya'. Leaving little more than a pink-teal bubble that slowly but surely started to pop up to the surface.

'Freya' surfaced once again. But in the place of the cute alchemist that had tried to cheat her way to the top was a girl that looked very similar to her. The main difference being her much more mature body, which seemed to have been copy pasted from the filth's feminine form onto her. The main difference between the two was the color of their slimy hair. The filthy eternal beauty was a deep pink, while 'Freya' was primarily teal with a few pink splotches mixed in to make it clear who was in charge.

"That's one. So many more to go, right, Mistress?" The Filth chimed, giggling as she ran a hand along the newly formed slimy girl's cheek. She was so cute, even though she was little more than a tainted copy of her.

'Freya' nodded as she started grinning as well. She said to multiply... And that was exactly what they were going to do. Like the filth that they were at heart...