FSE

Furry search engine

formerly SoFurry search engine

(F tf Bull-mutant)

The Arcane University had a rough few years- its previous management dropped the ball on magical regulations and several commoners got themselves into heaps of problems that snowballed into a situation that almost leveled the city. With its reputation very slowly crawling back to where it had been, the university took interest in, and started a research project around one of these sort-of mishaps.

Though this situation did spiral out of control- the initial creation was actually a resounding success and an interesting delve into combined arts. The Farlane sisters used both alchemy and magic together to create a topical potion that would imbue traits of an animal temporarily to someone- they had used this to induce extreme lactation in themselves to hold up their ranch. That part worked perfectly. Unfortunately this also resulted in one of the sisters unintentionally giving birth to a daughter who was cow... and then forcing the sisters to create a version of the potion that did the opposite of the original- to turn their cow-daughter into a human.

Then things really went out of hand when they made the mistake of relying on a poorly informed friend to dispose of some old equipment they did not need... which resulted in her getting some of their potion on her. The problem there is by that time the potion had well exceeded its expiration date and its effects were wildly chaotic- creating a bovine abomination rather than a cow. While under the effects however- her bodily fluids transferred the chaos potion... and the Arcane University got samples of her milk. That is where their new research project resides, understanding the effects of the potion after it expires.

To this end the university recruited Leila Agend- a smart and eager woman from the Arcanist wing, and Jerrik Numinous; the ace-student of the Alchemical wing. Jerrik is a serious honor-student; his hair is short and brushed back and his face kept clean shaven except for a soul-patch on his chin. His skin is very pale rosen hue and his eyes indigo. As an academic; while Jerrik is quite tall at 6'4", he is neither muscular nor athletic in the slightest. He is still considered quite handsome by many, and wears a pair of small round glasses that often slip down the bridge of his nose annoyingly.

Leila on the other hand has mahogany colored hair always tied in a voluminous pony tail. Her eyes are the same red wine coloration of morganite. She apparently claims to have needed to grow her hair long just so people would stop mistaking her for a boy- because her hips are not wide which means her butt is also small; but also her chest is flat as a board. Like, she is so flat she could go topless at a beach and no one would look twice- just assuming she was an effeminate looking boy. She is fairly tall for a woman- though not nearly as tall as Jerrik still. Her skin is a soft, smooth brown.

Mae Farlane walked into their research lab in the university after two weeks, just to take a peek at their work. Mae of the Farlane sisters is the magister- she created the magical component that made their potion do... well, anything. Without magic the potion is just a set of genetic instructions that will have absolutely no effect no matter how you take it- it needs the magic component in order to DO anything with the instructions.

She nodded to the work both had done on the project. "It seemed weird the university wanted to keep an expired tonic- but I guess our use for it created an interesting enough situation. You two have handled it well so far too."

Jerrik nodded, motioning over his alchemical portion of the work. "Your spell does not expire. If it runs out of energy the tonic becomes entirely inert. Due to presence of ambient mana- the chances of it burning completely out are slim without deliberately doing it yourself. The physical tonic however is made from organic compounds and will very much expire, and since the tonic is where the spell is pulling its instructions from... it is given corrupted instructions- you get corrupted results."

Mae nodded. "And violently ill, if you attempted to drink it."

Leila chimed in eagerly from the other side of the table, behind the stacks of books from her arcane research. "BUT; if we can find a way to reconstitute the tonic's power, we can create a deathless potion." She pat the pile of books. "As a fellow Arcanist you know more than anyone that there are thousands of transformation spells already- that is nothing special. But what you and your sisters made was a topical tonic that could be handled by anyone. Without a spellslinger present- someone could transform themselves with your tonic... which also has the handy side effect of you being able to transform yourself or others even if you yourself have been transformed into an animal, which would normally disable your ability to cast spells. Brilliant!"

Mae sighed. "But a deathless potion seemed like a fools-errand. To reconstitute the tonic you would need to undo the stages of rot the physical tonic has gone through... you are talking about what is essentially a form of food-necromancy. Even if you could pull it off... at that point it would take so much effort to do it is like... what is the point? Just buy a new tonic." She motioned to the samples they had set out in cryo-capsules. "Till I heard what the mutated potion did."

Jerrik nodded. "She transferred almost perfectly the results, via her milk and saliva samples. Which is what we have here- stored mutagenic milk. The fact that the mutated variant was able to project itself through another fluid entirely means that when one decomposes... you can simply transfer it to a different fluid. It re-writes the fluid itself the same way it re-shapes the person who is exposed to it."

Leila spoke up again. "Buuut that doesn't help if it transfers bad instructions. Decomposing tonic made mutagenic milk. So you get a chaotic mutant bovine instead of a cowgirl. We need a secondary potion that can rebuild the instructions, by back-tracking what the stages of decay would have done. We know how decay progresses. We can look at a skeleton and know whether it was a dog or a human even though it's rotted away already. Reverse-engineer the proper instructions based on what damage we can predict the rot did to it. A potion that can restore potions, and a potion that can self-replicate when exposed to any other fluid."

Jerrik muttered half under his breath. "Well... any other fluid that contains proteins. You can't drop it into the sea and turn the entire ocean into a potion. Nor would anyone want to."

Leila tilted her head. "So... why aren't you or your sister Maggy on the research team? I was surprised when I got the opportunity to co-head this project... it seemed like it would make more sense for the people who actually made the original to be researching this."

Mae blushed. "Eh. I have my own research- making new tonics and elixirs rather than prodding the corpse of an old project. Erm- not to undermine what you are doing, of course! We just... uh, me and my sisters had a unique experience while using these that is sort of personal... and not something I want to mix with my work."

One was an alchemist and the other an arcanist- since the original tonic is both; the University put them together. Rather than work together however... they sort-of just came at the project from two different directions, doing separate research in the same room. It did not help that their personalities were a bit conflicting as well. Leila was energetic and also clearly had some personal gambit with this project working. She is so eager to be done, because she wants to use it on herself as a 'cure' for her flat chest. Jerrik however was taking it very seriously and only in it for the academics. Both out of curiosity on the mechanics himself, and looking to earn himself accolades within the university for a job well done. One attempted to create a restoration method using physical potions while the other attempted to do it with spells. Instead of bouncing ideas off one another- discussions on methods just turned into debates.

Further annoyance to Jerrik however is that Leila kept inviting her girlfriend into the research room and often started making out, with Jerrik just awkwardly in the background. The room is admittedly gigantic for having only two or three people in it, but it is still hard to avoid looking at or hearing them when they are the only other people in it.

Jerrik eventually growled at them to break it up. "This is a research area! I cannot concentrate with you two trying to tie your tongues in a knot!"

Kaylie pouted, but Leila just laughed. "Well that is fine Jerrik, because I am practically done anyway. Once my version of the cure works you won't need to finish yours. But alsooooo...." She leaned so far over trying to reach a paper that she would have fallen off her stool if it wasn't for Kaylie acting as a counter-weight. "Kaylie is part of the team." She waved the paper in the air.

Jerrik immediately furrowed his brows. Kaylie is a Geomancer... she has no training in either of these fields. "What? How? Why?"

Kaylie chuckled. "Test subject."

Jerrik's eyelids lowered. The page Leila is waving around is a consent form- a waiver of rights. Kaylie doesn't know anything at all about this type of research, but she doesn't need to, to be a test subject.

Kaylie has the olive toned skin of an energetic Asian. Her hair is raven black and tied in a long braid that hangs in front of her shoulder. She is shorter than Leila but her bust is a great deal more impressive. Though a bit loose and wobbly- her breasts are an impressive G cup set, with very wide, soft edged areola. Her breasts are a bit on the plump side though so her boobs swallowed her own nipples- they are inverted when dormant. Kaylie has a bit of a soft belly, so her belly button is deep and sits in a long cleft across the front of her belly. Her butt is not particularly round but her thighs are huge! Most of her fat settled in her bust and thighs- so while she is very heavy for her height; she doesn't look particularly fat. Her eyes are green but fade to blue around her pupils- when she is outdoors in the sunlight the blue expands to consume most of her iris.

The next day Kaylie woke up as usual- rolling over to swat blindly at her alarm clock to shut it up and falling off the side of her bed in the process. She groaned and stomped her foot, folding the entire room in half and then returning it to normal so that she was already in the bathroom doorway without having moved. Imagine needing to say something or picture complex runes to cast spells? Man, couldn't be her. As a Geomancer Kaylie can reshape earth... but, not literal earth; the alchemical interpretation of Earth... which is, every solid object in the known universe. Normally you would need to meditate and saturate your being with mana to charge yourself to your elementalist attunement... but because she lives in the dorms at the Arcane University, she never runs out of mana. So she attunes herself once and then just stays attuned forever, unless she leaves campus for some reason. Her bending the shape of the entire structure to go places or bring things to herself is also the reason her room looks like a tornado passed through it.

When she finally gets ready for classes Kaylie steps out into the golden sunlight and onto the grass, avoiding the path so she does not scatter the stones on accident. She bounces on the ground and sends up a ripple- the wave of grass and soil carries her across the yard toward the main building without her needing to walk. You can tell how close it is to the starting time for classes when you hear several rapid-fire thunder booms as the Pyromancers literally ride lightning from the dorm to the main building- crossing the gap in a fraction of a second using the metal framing the glass front of the school as an anchor point for the bolt. Once inside the building she just stands in the foyer and discharges one of the bricks in the floor under her- launching herself up to the floor she needs and steps off onto solid ground to let the brick fall back into place on the ground floor. Kaylie does wonder if her Geomancy is why she is so... plump. Oh well- Leila loves how soft she is and calls her marshmallow as a pet name, hehe. Kaylie isn't particularly against her weight either- it made her boobs big and squishy! She is fat in all the right places.

She felt her phone vibrate in her pocket in class and glanced at the screen to see Leila was calling, but could not answer it in a lecture! They are covering transmutational elements today and it's already a hard enough topic to wrap her head around! A short ping sounded- and she switched to text messages and seen Leila left a single message telling her to drop by the research lab after class today- she has a working potion! Or a potion that SHOULD work. It wouldn't be a test if she already knew it worked.

Oh boy... well Kaylie can't really concentrate at all on class now even without talking to Leila. She is nervous about what this thing could do to her. The last people the mutagen affected turned into a real mess of squirting, leaky parts. If it works though- it will turn her into a cowgirl! Big lactating boobs or a heavy, squishy udder! Kaylie is a lesbian so she is just as eager to see her melons grow still bigger as Leila will be to latch on and start sucking. She blushed while daydreaming in the lecture of what sort of a form it could give her. Even the stable version of the original tincture still had somewhat unpredictable results. It gave you cow features- but what features and how far depended on where it touches you and in what amount. Leila's potion is the drinkable kind.

She scoot over to the lab immediately when class ended, and arrived before Leila was even entirely done! Well; she was done the potion, she just had to wait for the mixing machine to finish putting it together for her. The room is a bit oddly shaped- before half the university was destroyed a few years ago this was a titanic greenhouse, so the roof is rounded and high up for all the hanging plants that used to be in here. There is no longer any glass walls or even windows since the whole part of the school around it had to be rebuilt, converting this instead into a huge lab. The back of the room is mostly storage crates and cryo-storage cells for biodegradable material.

Kaylie gawked at Leila who just smiled and winked back knowingly. Her breasts are huge! She was flat chested yesterday! Kaylie did not want to ask questions too obviously though, because Jerrik is in the room with them, so she remained tight-lipped hoping Leila will spill the beans on her own. Her breasts are actually the same size as Kaylie's now, but look a bit bigger because her nipples are also enlarged and quite perky and she is also much more lean. She wanted to be done this project to use the fixed potion on herself and Kaylie... so did she already use it on herself? But then why is Kaylie's batch still being mixed? Wouldn't she have just mixed both at the same time? She could have technically used a transformation spell on herself whenever she wanted- she IS an Arcanist after all... but she wouldn't have been so excited to finish this project, and it would seem doubly-odd to wait till it was almost done and THEN use an entirely different method on herself.

They all had to stay later than they normally would. Even her stuffy co-researcher Jerrik had to remain to observe the results, so they all sat around bored. Kaylie got lost in thought looking at the cryo storage units. That is technically elementalist magic, but... really advanced. There is cryomancy spells, but no such thing as a cryomancer. Cryomancy is a type of spell handled by Thermomancers; a type of transmutational elementalist who control temperature.

Jerrik just sat there on standby, glancing over at Kaylie occasionally to see if anything happened, but he was sitting at one of the middle stools on the very, very long old wood table while the two women were at the very end, side by side. Kaylie drank her potion, scrunching her face up at the taste. It was extremely bitter, like, make your whole body convulse from the taste kinda bitter. Luckily its flavor did not linger in her mouth. While they waited- Leila whispered what really happened to her chest. Even Kaylie scolded her a bit for being so reckless with a potentially dangerous substance. Leila got too impatient and when left in the lab by herself... she took the original mutagen! She only used about a shot-glass worth of the mutagenic milk, but still. It is entirely unpredictable!

Leila pat her lap and leaned back against the edge of the table from her stool so Kaylie sat on her lap. She glanced back at Jerrik making sure he was not looking even though she has her back to him, then for a brief moment lifted her shirt, making Kaylie go wide-eyed as she seen the second pair of breasts!! Leila has four breasts! But the second set are only B cups, so the top pair hold the shirt too far out to see the second pair with her top on. The nipples on the second pair are the same as the first- making them look disproportionally large to the boobs they grow from. Because her regular skin is a soft brown; her nipples and areola are jet-black. She flopped the shirt back and let Kaylie poke and roll the erect nipples around through the fabric. Ooooh, so rubbery! Apparently she just grew her breasts larger with the dose she gave herself- however, it also caused her to lactate. The mutagen transforms whatever liquids you produce into more mutagen- the milk running down her original two boobs touched her chest below and caused the second pair to spawn. So the multi-breast aspect was actually a second transformation she experienced later. Damn... if this is the sort of mutation it gives you, maybe she wouldn't mind if her dose failed after all.

"That is so hot..." She glanced over her shoulder at the clock over the door into the room. "When uh... when is my changes going to start though?"

Jerrik sighed, standing from his seat to leave. "An hour and a half ago. She failed."

Kaylie looked at Leila, and Leila half-shrugged and half-nodded. "Yea... it should have done... SOMETHING by now."

Jerrik shrugged. "If I had to guess- the reversal process you induced reversed ALL of it instead of just the decayed process. Basically; it regards the changes of the spell on the person the same as the changes of decay on the spell itself, and negates the entire thing. It is a transformation and reversal spell in one neat little package, so neither effect does anything." He looked at them over his shoulder before leaving. "Failure is the first step toward progress though. She did not transform- but she also did not mutate horrifically, so you did technically stabilize the mutagen. It is a start."

Leila was going to invite Kaylie back to her dorm room for some fun after, but was actually a little bummed out that her restored potion didn't work, so they went back to their own dorms for the night. Leila's potion ended up being so stable that it did nothing at all. She did not know how to approach her research now and was back to square one. Kaylie wished she could help but... she is an elementalist- they are both spell casters but completely different schools of magic, Kaylie would be utterly lost looking at Leila's research papers.

On her way back to the dorms she abruptly stumbled off her ripple of earth! At first she thought she hit something more solid, or someone left a bike or something that interrupted the flow. They remained in the school late so the sun was already setting- the lighting was dim so it's easy to miss something, but no. There was nothing there that would have stopped her wave. She concentrated and motioned to the ground- it shifted abruptly to the side enough to break the grassy surface by accident. Oops- too much. Why is she having such a hard time?

"Oooooh." She gasped in realization.

The transformation potion. Transformation magic overlays your mana with its own- the transformation is made of the configured mana, which means you generally cannot use magic while transformed. The layer of already shapen mana basically acts as an unintentional filter to any attempt to manipulate more mana. Kaylie did not transform but that configured mana is still in her body. Well, damn, she actually has to walk now.

As Kaylie started to walk though, her muscles slowly started to feel odd. They were not sore but... oddly tight. Every so often she would feel the muscle twitch as well- and not just her legs; everywhere. Her skin started to feel unusually tight too eventually as she approached the dorms and her body was really heating up. You'd think she just got back from a mile-long sprint, not a casual walk home.

Kaylie glanced down to grab her shirt and fan herself and cocked an eyebrow at her breasts. "Uhm... did... the potion work? Was it delayed?"

She felt the tickle of beads of sweat forming in her cleavage escape through the bottom so went to fan herself with her shirt but when she looked down her breasts were closer to her face! They haven't gotten any bigger but they are considerably tauter! They stood up! They are much rounder and higher-set on her chest, putting them closer to her face. Kaylie groans and presses her back into the wall of the hallway as they tighten even more, tugging on her very wide, soft-edged areola. Her nipples started to pop out of the soft cleft they sleep in! Against her olive skin her areola and nipples are a pale diffused brown.

Kaylie braced herself and breathing heavily she hustled the rest of the way to her room on the second floor of the dorms and slammed the door behind her. Something was definitely up and it must be the potion because the timing is too coincidental. But why was it so delayed? She was in the lab almost two hours after drinking it and absolutely nothing happened at all! Kaylie went to plop down on her bed to sit but didn't get more than step away from the door before stumbling into it with her back to it. All the muscles in her body tightened! She went red faced and her whole body felt swollen! Her muscles all bloating larger at the same time was such a strange sensation! It felt like she was going to get a full body muscle cramp, but the muscle was growing as it was tightening so it can't cramp. It almost felt like she was somehow getting a full-body hug, being lightly squeezed on every inch of her body!

On the surface it just looked like her skin was pulled unusually taut- because she is already a bit clammy with sweat her skin pulling tight caused it to immediately look glossy as the pours were pulled smooth. After almost a full minute of this and her alternating between groaning and panting- divots started to appear in her pudge! Her muscles are cannibalizing her fat! The divots are the gaps between muscle groups! It took so long for her weight to visibly alter because her muscles grow at the same speed her fat diminishes!

She clenched her eyes shut and squealed as a pressure surged in her breasts- causing the skin to pull the tightest around her nipples, yanking the pleasure nerves tight and making her shudder from the sharp pleasure! As if calling dibs on the last of her body fat, her breasts swelled even larger than pert Es! Her nipples also became so erect that they swelled beyond their normal size! They only project four centimeters out but are as wide as a narrow energy drink can, making them look almost like tree stumps!

She collapsed onto the floor on her hands and knees breathing heavily once her breasts stopped swelling, and she actually tore some of the seams on the side of her shirt. The force of her breasts dropping with her yanked on the front of her shirt hard enough to rip it. Kaylie was looking a lot less soft and a lot more solid, switching from pudgy to lean to athletic real fast. She made strained groans as it almost felt like her muscles were growing too quickly for the rest of her- pulling on her joints. She squirmed a bit and even crawled forward toward her bed a bit as many bones popped and clicked from her movement! Her entire body is enlarging, causing her joints to need to re-set at their new size! Jerrik is 6'4", Leila is 5'7"... Kaylie is supposed to be 5'1" but that shifted quickly to an even 6 feet! Her clothes felt so tight! Good thing she rarely bothers to wear a bra, or it would have strangled her to death.

The pressure and pleasure shifted and concentrated abruptly again like it did in her breasts- except this time just over her anus! Kaylie immediately dropped her face to the floor and butt in the air and squealed, her body tensing from the sudden assault on her nerves! Her tail bone nudged itself out, longer and longer in throbs of growth, poking over her pants further and further, growing longer a lot faster than thicker, becoming a long ropy tail. The sensation started to fade after it grew to three feet long, and she almost started to push herself up off the floor when the sensation hit her like a wall again! This time it was prickly, and almost itchy! The bottom of her tail bloomed quickly with a tassel of black hair!

Kaylie remained laying there for almost ten minutes- afraid that if she tries to move the transformation will surge and just collapse her again. Eventually she got herself to her feet- but the moment she arched her back to get up onto her knees her shirt tore the rest of the way through, up the sides to her arms, causing her tits to flop out loose in the front without a prison of cloth over them. She just pulled the rest off and tossed it away since it did nothing to hide her assets anyway. She needed to make her way to the bathroom to look at herself properly, because her melons blocked the view of anything below her chest. Her breasts were the size of a medicine ball each now, and held quite high and round on her chest. She squeezed them as she made her way to the bathroom, but was unable to produce any milk from them. Isn't lactation supposed to be the one consistent thing across all versions of this potion and mutations? They ALL lactate, but Kaylie isn't.

Taller and leaner, she can hardly recognize her body in the mirror. It looks like someone photoshopped her head onto someone else's body entirely. She practically drooled over the sight of her own big, round tits in the mirror and started to grind her pussy into the edge of the sink counter as she leaned toward the reflection and shook her tits to watch them swing and bounce! She decided to have a shower to cool down, taking her long braid out to let her hair loose. It hangs to the small of her back, and because she keeps it braided so often it is filled with tight waves.

The cool water washing over her certainly cools her body off, and washes away the sweat... it only increases the heat of her arousal. Now her tits are huge AND shiny and wet! She started pawing at her pussy with one hand and kneading her tits with the other- trying to pinch both nipples into the grip of one hand and shake her tits up and down by the nipples like handles. She was so distracted she wasn't really showering, and rather than run the water bill through the roof she decided to clean her hair quick and get to bed so she can handle her pussy. She did not even fully dry her hair off before she darted to bed in the nude and barely scrambled onto her bed before stuffing a pillow under her upper legs to prop her hips up. On her back, her boobs divided themselves- pointing forward and to the sides as they roll off either side of her chest, giving her a valley to look through to her pussy.

Her clit was going absolutely nuts- usually it throbs from semi-soft to full erection but right now it was fully erect and throbbing to swollen! The neon pink flesh almost started to turn pale violet from blood pressure! If she knew better- Kaylie would have known that staying in the shower to do this would have been worth the higher bill. Her pussy juice has stolen the mutagenic properties of the failed potion, the more she produces and gets on herself the more she will change.

Deep inside her ovaries start to bloat up huge! They start to pulse, surging hormones into her system... but they are giving off testosterone, not estrogen. She keeps visualizing her mutated, busty Leila and all the things she wants to do with her, and her fantasies devolve the hornier she gets, from cuddling to sucking to fucking to rutting like beasts, bent over counters, in hallways, fields, anywhere- EVERYWHERE. Inside her ovaries her egg cells start to grow tendrils like mutants themselves. As her fantasies devolve to a sexual blur of dominating her smaller, female mate a divot forms across the surface of the eggs, till it pops all the way through! Her eggs burst apart into four sperm cells each! Her ovaries mutate into testicles! Her pussy keeps clenching in arousal, but every time it contracts it shrinks to that size, so every contraction makes her pussy smaller! The weight and size of the testicles collapse her womb entirely, and then shove down along her vaginal passage fusing it shut like someone closing a zip-lock bag! On the surface it looked the same, only the opening was shrinking, so Kaylie did not realize what was happening till it was too late- the only part her brain registered is her passage was getting tighter and it felt better to finger-fuck it! She only owns one dildo and it's double-sided, so she can re-configure Leila's organs with the other end of it. Not as fun in singleplayer.

Her clit started to swell up huge- bloating to the size of a large marble, then a ping-pong ball! It looked like an angry knot of muscle! A pressure surged in her body and it felt like something trying to shove its way out through her pelvic floor- she scrunched her face up and pushed instinctively- not expecting to suddenly birth her own gonads! One and then the other testicle surged out immediately after as the lower labia fuse together to form a scrotum to catch them in! Her gender inverted! Her urethra and clit remain untouched though... so she has balls but no penis.

"Uh...ah... uh oh. That... shouldn't... be. Mutating? So... it didn't work? But, but why was it d-nnngh...later. Deal later, need to CUM." She frantically resumed rubbing her engorged clit, unable to stop herself.

Two bumps formed over either of her temples as the hormones corrupted her thoughts and made her even more strongly lesbian than she already was. Kaylie groaned and arched her back as her muscles started to swell again! Fat veins were pinched between skin and muscle, bulging out of her as she grew. Her flat tummy turned tight, then divots formed as her abs bulged out and her navel vanished between them, giving her long and deep cum-gutters. The muscle on her arms and upper back bulged alarmingly fast however, swelling to inhuman sizes! Bone processions extended off the vertebra in her upper back, causing her back to rise up into a hunch- to give the swelling muscle there some added structural integrity. Like the steep slope of a bull's upper torso. Even her neck looked muscular! Her face turned red and her vision pulsed blue from blood pressure behind her eyes- the veins in her neck bulged massive and her neck started to get wider than her actual head!

Her hair is usually a bit frizzy after a shower, but now it started to rise up where her body did not pin it to the bed, becoming bushy and fluffier than it should be able to... gaining properties of fur, rather than hair. The bridge of her nose filled with a pressure almost making her feel congested- even though she could still breathe just fine. If anything; her breathing was deeper than ever, starting to sound like the snorts of a rutting bull as her nostrils dilated larger.

Kaylie's clit stood up as a chubby cone! She folded her index and middle finger and used the knuckles along to grip the sides of her clitoral hood and started to masturbate the base of her clit alone with it- since penetrating her pussy no longer works- no vagina. That technically makes her a male- just, a really under-developed male. Her balls continued to enlarge- the scrotal flesh darkening to a more tan shade and stretching longer under the growing weight of her undulating nuts till it sat on the bed between her legs- pinning part of her tail under it.

Even the ends of her toes felt a pressure- her nails had turned black without her noticing; darkening further with each added layer of keratin, till they grow so large they start to shove the surrounding skin out of the way! Nails turned to oddly thick claws, and then into tiny hoof segments! The nail on her biggest toe however becomes soft, and the toe starts to regress in size and complexity while the others grow instead. She finally hit her peak- bending forward and grunting loudly like a beast! Her balls yanked up quickly in her longer scrotum to hug her crotch, but then gurgled audibly and swelled still larger to the size of oblong ostrich eggs! It felt like she was already having an orgasm for several seconds before she actually ejaculated-firing a rope of white goo from her urethra! It was so thick and so long-lived however that it yanked the urethra OUT!

It almost looked like she was having a urethral prolapse, but the entire remnant of her pussy was getting shoved out of her by the strength of the ejaculation- and her clit extending gave it structure. The muscle ribs that formerly lined her vagina now helped erect a shaft! The portion of her clit that was formerly the only exposed part is now the head of a forming penis! The growth and mutation surges with the pulses of her orgasm- as if the pleasure itself was deforming her body from its intensity! Bigger, longer, arching upward from its rigidity, violet veins in its base throbbing darker with each surge before fading back into the neon skin. What had been the clitoral hood now closed around and joined the top of the scrotum, forming out and thickening into a sheath! Her growing phallus did not seem to gain any definition as it grew, and it continued to get thicker at the base the longer it became- becoming a tapered penis of a bull! The mutagen gave her traits of the wrong gender! By the time she stopped cumming and her balls heavily sloshed back limp- her dick was fully formed and eight inches long. But her semen is also a mutagen- so her penis continues to grow even after it stops coming out!

Kaylie quickly gets up and scrambles to the bathroom- almost hitting her head on the top of the doorframe. She must have gotten taller again too- a little bit anyway. She groaned at the sight of her poor genitals after washing them clean - only half-stepping into the shower this time since she was only rinsing off her lower body. She is fully lesbian- so she has no affection for this foreign organ at all, it looks hideous to her. She has a hard time making herself hate it though... it certainly FEELS good. The tug of the weight from her balls swinging around under is almost kinda... fun. After washing herself she remains with one leg in the shower and one out, rolling her hips to swing her low-slung nutsack around. Heh, kinda hypnotic, like boobs. Well- her breasts are also larger themselves, so she supposes it's not all bad. Her arms and upper back are absurdly muscular compared to the rest of her. When she leaned on the sink counter to step out of the tub the cracked the wall where the counter attaches to it! Muscle is heavier than fat- Kaylie is actually almost four times as heavy now as she was when she was pudgy.

She narrowed her eyes at her reflection before leaving the bathroom. It almost looked like four giant zits on her forehead. The budding horns have grown large enough that all the blood in the skin over them has already been forced out of the area from lack of room- so the nerve endings there have also gone dead with nothing to feed them. The skin is pale and overly stretched. She reaches up to touch them but the moment her fingers make contact with the taut skin, it ruptures, making her gasp! A few drops of lingering blood flick out onto the mirror but otherwise the wound does not bleed. The horns rupture their way out, exposed to the air finally. Four horns total- two over either temple, and they are side by side, stacked vertically. The pressure in her nose died down, and her nose seems the same- nostrils are a little bigger but nothing crazy. The mutations must have run out of juice before that change could complete.

Kaylie needed to lean partially on everything she passed, because her feet no longer worked right. Small hoof segments dominate four of her toes and her middle toes have grown huge. Her entire foot has lengthened considerably, to the point where she can barely clear the floor when she lifts her leg, which means it's easier to walk on the ends of her feet only, and keep the heel off the floor permanently. She still has a big toe- but it doesn't look like a toe anymore. It looks like a big bubble of flesh on the side of her long foot- it did not stretch with the rest of it, so it's not even close to the other toes. A bull only has four digits.

She flopped heavily into her bed and almost immediately passed out, going to sleep. The hormone signals sent from her new balls knocked her out almost immediately- she has never experienced a male orgasm before so it blind-sided her. Her sleep was deep, but filled with wild dreams and lusty fantasies. She is so huge now, she wanted to grab Leila by the legs, pick her up and shove her face into Leila's twat like someone pushing a slice of fruit onto a juicer. Her fantasies latched onto that and devolved into almost exclusively pussy; the salty taste, the rubbery flesh... and now, imagining what the undulating ribs of its inner muscles would feel like stretched around a bull cock. Kaylie was so deep in sleep however that she did not wake up from the pleasure of her new dick emerging from its sheath as she ground it against the bedsheets below her. They quickly became sodden with her pre... causing the mutagenic fluid to re-absorb into her crotch.

Pleasure automatically pulsed as her prostate brushed against its surroundings as it swelled larger inside of her, producing more mutagenic fluid to douse itself in! Her balls danced back and forth in her scrotum as they swelled bigger, and bigger, heavier and heavier! Her pubes spread, consuming the scrotum and sheath in a layer of short fur- though it got a bit longer along the seam of the scrotum where the two former labia fused. She hummed in her sleep from the sensation of someone running their hands on her groin- in reality the gentle nudging feeling on her crotch is her still growing balls drawing up! As big as basketballs and still growing! The skin on her scrotum alone now as thick as finger! You could grab a fist-full of that ballsack and yank as hard as you want- you will not hurt it.

Kaylie woke up a few minutes before her alarm was even supposed to go off the next day! At first she was terribly confused because it felt like someone was pulling her off the bed, but glancing groggily at the foot of her bed told her that there was no one here other than herself. Who is pulling on her pussy? Wait she doesn't have a pussy anymore. Who is pulling on her balls?! She sat up a bit, but unfortunately that let them lurch further off the edge of the bed, and Kaylie was suddenly yanked forwards by her now beach-ball sized testicles rolling off the foot of the bed, yanking her by her scrotum to the end of the bed to join them!

Her heart rate jumped and she just gawked at them with wide eyes for several moments, watching her pre burble up into the loose scrotal flesh draped between her and her gigantic nuts! Unfortunately she doesn't know enough about the project to realize yet that it is those very fluids that are causing her to continue to change. She gingerly grabbed her dick with one hand, slowly moving it up and down, and then placed her other hand below it. She groaned and shivered from the pleasure, causing her hands to freeze in place a moment to brace herself against the sensation... but the shaft kept moving against her grip! Her eyes go even wider and her head starts swimming in horniness- the cock is growing larger, sliding out of her grip! Nine inches, ten, eleven- starting to get hard to grip all the way around the shaft. Veins bulge and the shaft throbs unusually... even her cock itself is starting to look oddly muscular! Her body feels cramped and unsettled, and starts to vibrate slightly from sudden internal movement as joints pop entirely on their own... her bones enlarging. Her entire body is growing bigger! Her bed starts to sag under her weight even though she is only sitting on the edge of the bottom so her entire weight isn't even ON the bed in the first place! Even her face feels tight- the pressure in her nose is back. The skin around her horns stretches open wider- all four horns starting to grow longer, pointier- and because they grow so damn close to one another; they start to twist! Her horns form a tight twist on either side of her head- they grow out sideways for a distance before curving up.

Kaylie starts to masturbate- her hands moving on their own, but once the pleasure hits she consciously leans into it and speeds up. She has to distance her hands on her expanding shaft in order to cover it properly- if she put them both near the base there would be too much exposed shaft and it would be wobbling back and forth to hard it would flick pre into her eyes. She curled her toes in pleasure, but that only caused the changes to her feet to resume! Black fur started to grow on her knuckles but as the hoof segments expanded to consume them it pushed the fur together around their base, then spread up onto what was formerly the back of her foot... and now the front-facing side of her cannon bone as the bones within fused into one. Her thighs bulge massively with muscle where they were formerly rotund with fat- but they do not change shape, so she is still very much bipedal, even after her feet devolve entirely into cloven hooves!

Her sheath thickens, sliding up a bit further over the base of the shaft every few seconds before more shaft grows out and pulls it taut again. Twelve inches, thirteen, fourteen inches of cock- her fingers and thumb can no longer meet around the shaft, it's too thick! Her fantasies devolve further with every inch of cock meat she grows- from romantic to sexual, from sexual to aggressively erotic, and finally to fractures visions of cock and pussy colliding, thick smells and rutting- a blur of sexual bliss and base instinct. The bottom legs on her bed explode out from under her- splintered under her growing weight.

Her heavy breathing turns to loud grunts like a rutting bull as the bridge of her nose pops loudly. With a hollow pop the cartilage lets go and her nose becomes much wider on her face and her nostrils flare large! The diffused red of her lips spreads up to the end of her nose as her enlarged nose grows out, so the bottom is level with her upper lip- and faces straight forward! If you look at her face dead-on, it looks like the face of a bull, but she has no actual muzzle. She grunt and scrunched her face up a moment from the sensation of short black fur growing out of the bridge of her nose, in a stripe up to her hairline. Her hair itself formed a gigantic, wild mane. It was already as long as her lower back but turning into the consistency of fur caused it to fluff up and become almost as wide! Thanks to the steep waves in it that holding it in a braid usually gave- it licks wildly this way and that.

Her shaft started to bloat unusually wide, forming three distinct cylinders before somewhat relaxing into a single tapered pillar. Her ears started to stretch, but luckily this is where her current slew of changes end. Like sand falling to the bottom of an hourglass- her gargantuan balls lifting up the long scrotum to her crotch indicated how close to the tipping point she got. Thanks to how sensitive her giant dick is; it did not take her too long to peak. Thanks to her sitting on what is left of the end of her bed- her thick ropes of cum fired up and away from her- nearly hitting the roof and clearing the room up to the bathroom doorway before slapping down heavily. Kaylie's body convulsed with the force of every shot along with the powerful bucks of her bobbing cock- the flow of cum is so strong she can swear she can feel the fluid rush out all the way back from her prostate. She was starting to get worried after firing off 16 ropes of cum, but they finally started to get weaker... after two minutes she finally tapered off. Which doesn't sound like a lot, but the average human orgasm usually lasts a whopping twenty seconds and ejaculates a tiny fraction of that. Luckily none of it landed on her to mutate her more, and she went for her cell phone before she attempted to clean it. The giant phallus returned flaccid very quickly, swinging down and plapping against her nuts before reeling itself into the thick fleshy nest that is her sheath.

Kaylie immediately phoned Leila, hoping she is even at school yet. Jerrik would definitely be there at the crack of dawn, but Kaylie doesn't have his number so that doesn't help.

The phone started ringing. "C'mon, c'mon pick uuuup. Fun is fun, but this is getting crazy."

"Heeyyy! How's my marshmallow?"

Kaylie smiled at her energy. "U-ugh...gh-good. Ish. Good-adjacent. I am not injured at least."

"Ooookay, well that is a start. Something... up?"

She looked down at her body and sighed. "What should I do if your potion started to oh I dunno... mutate me into a cow-thing?"

"Tell me in detail so I can diagnose its effects and figure out what is wrong. If anything. You were supposed to turn into a cowgirl- that was the point."

"Uh yea- well it definitely didn't do that. I started to get bigger boobs so I thought it was working on a delay but uhm... most of what I got is bull traits- not cow."

She gasped. "You got... did it give you a... bovine willie?"

"Oh it sure did. And it doesn't want to stay down. And it's so big that when I tried to... tame it- it almost tagged my roof with its goop."

"Aaack, don't touch it!"

"Well I didn't want to, but I had to get it to go down!"

"No I mean the cum not the cock- you can touch the dick all you want."

"Huh?"

"The mutagen transfers its properties into whatever other liquid it comes into contact with. It is in your body now, so your ejaculate is mutagenic."

"Oooooooh. Well that explains why the changes hit in a second wave this morning then. But... I have nuts the size of fucking truck tires... the hormones are going to drive me mad."

"Uh yea... stay in your dorm room for now so people don't freak out. I will see what we can do on this side... I will try to go to you later. Or actually... maybe sneak you into the lab once everyone else clears out of the main building for the night? Would you mind sleeping here in the lab? It might be safer, and I would be here with you and also still researching a cure."

"Yea I guess. I kinda outgrew my dorm room, and the lab is bigger if nothing else."

Kaylie did not know what to do when she hung up. She is basically waiting on Leila now. She can't even clean up the mess she made without risking touching it and mutating which meant she had the thick smell of cum to deal with. She tried to read, but failed, tried to play some games and failed. She tried to eat and got so distracted she burned the food. The whole day was spent trying and failing to not think about pussy. Her giant balls lifted themselves off the floor every so often and made a loud, dull thud as they drop back down. She is leaking pre almost perpetually- but luckily it isn't nearly as mutagenic as her cum, and she knows enough to wipe it off right away if it touches her.

A while later Leila texted her an update that Jerrik was trying his tincture now, and then fifteen minutes later reported that it did nothing and he went home for the day. Really? He only waited like ten minutes after taking it to see if it worked? They waited two hours to see of Kaylie's potion worked. Why did he abandon ship so quickly? Especially after Kaylie's mutations were so delayed- his could be too. She wasn't really in a position to question their research though; she didn't know squat about this stuff.

It was already dark by the time Leila phoned her. "Hey, holding up? Sorry I stayed really late tonight trying some research trying to find a cure but... I am really spent so is it okay if I get you in the morning?"

"Yea, I will try to hold out. It's the horniness that I am really fighting, its... really messing with my head." She narrowed her eyes. "Why are you breathing heavily?"

"A-ah, it's noticeable?! Well... I uh... tested a theory of mine and I uhm... used more of the original mutagen."

"Again?! That isn't research! So now your four-pack is even bigger?"

"Mmmhmhm, all four are like medicine balls with teats the size of fucking sausages." Kaylie lurched forward, immediately trying to think of something gross as her dick surged at that news. "I didn't mutate that badly though."

"But you did mutate more?"

"Yeaaa... I may have two tails and four ears. BUT. For the original chaotic mutagen? That is SUPER tame. By giving myself very small doses I already mitigated a lot of potential hazards, which IS good for the research. That gives us the information that the mutations play off one another- an already existing mutation causes future changes to more likely to be mutations."

"And that helps you cure it, how?"

"My original control method caused the potion to do absolutely nothing to you, and then failed utterly. So it was too strong and then nothing at all. If I can make an inhibitor that deliberately allows a slow trickle of effects through- then we already have a better version of the mutagen, and it will last longer than my original because it's expending energy more slowly. Still not a working potion- but closer already by default." She muffled a chuckle. "And I have got super mega titties in the meantime~"

"Okay titty monster- but how close are you to actually making a cure?"

"I don't know, honestly. Because I don't know if my next attempt will work or twenty attempts down the line. At this point we know what parts of my potion did work, and hopefully tomorrow we will find out why Jerrik's tincture did not work. Based on those results we need to make iterations, and keep trying till something works."

Why couldn't Kaylie have gotten those changes? Leila sounds so fucking hot right now! Kaylie's nipples got a lot wider and her breasts both enlarged and firmed up, so her nipples can no longer invert... but she isn't lactating, and it sounds like Leila got a lot more boob for her buck without any of the other mutations Kaylie ended up dealing with. Especially having her pussy taken away to make room for this monstrous meat. It was fully out thanks to Leila talking about her body- but luckily not erect, it just wobbles around in a lazy arch out from the sheath. Kaylie ended up taking an empty grocery bag and tying it to her dick with an elastic band to catch all the pre she will leak in her sleep- since it never seems to stop flowing no matter what.

Leila woke her up the next day so early the sun hadn't even woken up yet. Kaylie just blinked at her clock, taking a full twenty seconds for the numbers to register in her head enough for her to groan in reply. As soon as she tried to get out of bed the top two legs snapped off from her weight, making her sigh. The garbage bag she tied to his dick was overfull- the floor was drenched and the bag was entirely full. She just half-tied it and tossed it toward the tub in the bathroom- her cum blocks the floor so she cannot actually get IN to the bathroom. She lumbered over toward the door but then paused and told Leila to open it herself. She did not remember to lock it last night- and in her current state she is afraid she will unintentionally rip the door off its hinges.

Leila's pussy quivered at the sight of Kaylie the moment she stepped inside. Kaylie had to put her hands on her sheath and push it down, trying to bend the behemoth cock at an angle to interrupt its supply of blood as it immediately engorged at the sight of Leila. Leila is dressed but her clothes cannot really hide much of anything- her bottom tits are entirely out, the top breasts are just barely covered themselves. Her smooth, soft brown skin, jet black teats that are absolutely absurdly sized- even for her enlarged breasts. And she is so tiny! She seems so small and fragile in comparison. Only now did Kaylie's increased size really hit her, standing in front of her lover who used to be taller than her- and is now only a third her size at best. Kaylie cannot even stand up straight- not only does the muscle bulk on her back and arms weigh so much that it gives her a bad slouch; even if she could stand perfectly straight, she would skewer the roof with her horns. She is as tall as the room itself- not including her horns.

She kept remembering her dream where she lifted Leila up and pulled her own over her face to juice her pussy. She looks so beautiful to her... the male hormones are making it even worse- never mind love, or even lust; her brain was breaking down into ravenous obsession and crippling need. She is so tiny and delicate and pretty and hot and perfect; Kaylie wants to cuddle her, brutally fuck her, protect her and destroy her cunt all in the same breath! Leila could feel the vibrations in the floor from Kaylie's balls thudding down.

"Wo-ooow... hoooboy."

"I look like a freak!"

"A hot freak."

Kaylie smirked timidly. "I guess you are bi, so you are sort of into this kinda look huh? Well... maybe I could warm up to it more if it wasn't driving me nuts. These balls won't stop... I am leaking everywheeeere. I already tried to... y'know... tame it. It didn't work. Not for very long anyway."

"Yea- I could smell it at the end of the hallway, haha." She squirmed out of her outfit almost comically fast.

Leila offered to... ease her burden. Kaylie was not going to argue that. They should both know better at this point- knowing both of their bodily fluids are mutagenic but also both lovers were so madly turned on that it never occurred to them in the moment. Kaylie's balls do not stop undulating and her prostate just keeps burbling up pre unendingly. The fact that it's been a few days since their last romp also did not help. Kaylie could not mount Leila at risk of absolutely destroying her by accident, and she barely fit in the room anyway. She just flopped back on the floor, shaking the entire building a moment. There was not even a point in crawling back to her actual bed because it's been utterly flattened at this point anyway, and surrounded on all sides by puddles of dick drool. Leila climbed up onto her lap and looked at all the fat veins converging on the tight groin into the base of the sheath- her pubes converted to a mat of black fur. The penis shaft bulged abnormally. Violet colored veins visible below the surface, it seemed to be bulging out wider... her dick almost looked... muscular. It seemed to bend slightly this way and that, bulging in certain places and watching this- Leila figured out what was wrong.

"Still mutating... slowly."

"Really?"

"Are you aware of the condition known as diphallia?"

"N...no?"

"Well." She put her index on the end of the dick and started to push down. "You will be."

Kaylie groaned loudly and her shaft started to bulge on the end as Leila pushed down as if trying to shove it back in on itself. With a wet smacking sound- it bent slightly... in three different directions at the same time. Leila recognized a divot in the shaft when it throbbed- that looked like the divot forming in her tail before it split. Shoving down on her cock caused it to split into THREE separate shafts! When Leila let go, the tips flicked apart too, then with a mighty series of throbs the shafts started to split away further down, almost looking like a strange banana peeling itself. It felt sort of like someone peeling tape off your skin slowly- well, a patch of skin that didn't have hair on it. The three dicks were connected still by a web of pre on their tips. They released several short shots of pre- almost looking like she was having an orgasm except the fluid is clear instead of white. The cocks splitting is creating such a constant buzz of pleasure its making her squirm wildly. Her balls slide up her long scrotum and pat Leila on the butt, surprising her.

"T-t-too m-muuh-much c-COCK!"

"Hmmhmhm, speak for yourself. Just enough for me~"

Leila grabbed the two side-by-side upper dicks and used them as leverage to stand up and then sit back on the third dick which was below and centered between them. Because they are so long, you can actually feel the ripple of stiffness surge up their length when the muscles in their base clench. The urethra flexes tight first, then a quick wave up the meat of the shaft. Kaylie was so overloaded with hormones and pleasure she could not even think of anything to say, she just lay there breathing heavily under Leila's mercy. She is breathing so rapidly and heavy that it almost sounds like the snorts of a bull rutting.

Leila could not take the dick to the base... it's almost as tall as she is- she would have to skewer her entire body to bottom out on it. She did take the majority of it, and rocked back and forth on it, trailing her own pussy juice down the shaft, which in turn traced the soft curvature of the veins on its surface. She pistoned both the other dicks in her hands- the constant flow of pre offered more than enough lube to not need to warm up to it. Kaylie was weakly bucking her hips against Leila's weight- not even doing it on purpose, she could not help it; it was a reflex to the pleasure bombardment!

Leila occasionally bent forward to give one dick a suck and then the other, and eventually brought them closer together squeezing them to the sides of her quad-tits with her arms to give them both a tit fuck while riding the third! Leila's guts bulged every time she leaned back- causing the shaft inside of her to bend outward. That probably feels great now- but it's going to ache like hell after they finish.

Her breathing become considerably more rapid and her eyes widened as the rising pleasure was followed with more changes. Four black dots on her lower gut slowly stiffened and stuck out like moles, but continued to grow. Only now did she remember they are BOTH mutagenic. She is getting another full dose right now by riding these behemoth prongs. Though... it is a byproduct of the partially inhibited version, so... maybe it won't be too bad? She isn't getting off till the ride is over, either way. She is too horny to stop regardless.

Kaylie could barely think of anything- the pleasure was so white-hot it overwhelmed every cell in her body. She did not have a dick a day ago- so it's fresh meat; it hasn't been exposed long enough to anything to be desensitized, and now she has THREE cocks?! No one's brain is programmed to handle three dicks. Somewhere deep inside of her she at least half-thought of the idea that they are going to mutate worse because of this, but, Leila knows more about this stuff than her- so she is just going to follow her lover's lead. The lower sky tinted pink as the sun started to peak up- since it is low in the sky the sunbeams fired straight in the window highlighting two of Leila's four breasts and half her face as she rides the obscene meat pillars. She is pulled so tight around Kaylie's cock it feels like wearing a condom a few sizes too small- not that she would personally know what that feels, either. Having her pleasure so... external, felt very strange and new. But also... actually having such a large slab of her body stuffed inside of Leila was so, SO hot. She is jammed up inside of Leila deeper than she could have ever gotten before. There is so much cock stuffed into Leila right now she is like a puppet with someone's hand shoved into her. The one morganite-colored iris that the sun lands on looks like it is glowing purple from the refracted light. Leila had to REALLY grip the other two penis with her arms to hold them against the sides of her breasts to rub- when they buck; they buck almost hard enough to yank themselves out of her arms, and they are slippery as heck at this point. Every throb tugs her entire body forward slightly and jiggles her four pack of tits, making her giant teats flop around.

As the slippery and salty precum absorbs into Leila's body through her vaginal lining, her own mutations slowly progress. Her nostrils started to grow, but mostly wider rather than taller- eventually the openings fold in slightly making her nostrils sort of shaped like a J. On her lower midriff the four black teats grow longer and fatter- quickly trying to match the teats on her breasts. Even compared to the teats of an actual cow- Leila's are abnormally big. A cocktail sausage? Sure, but the size of an actual sausage? Yikes, that is friggin' big. Before they were even half the size of her breast's teats; their coloration started to fade further in around their base, connecting them as they turned the entire surrounding area matte black! When the udder started to form, it at first just looked like one singular bulge shared between the four teats, slowly lifting further forward as a giant pad of fat and nothing more. This turned Kaylie on even more- she was grunting and gusting air out of her nostrils so loudly it started to sound like a bull hyperventilating. And even in her arousal Leila got a little nervous as she was forced to straighten her legs and lift herself further on Kaylie's crotch. All three cocks are growing still larger- she is already entirely full, so the bigger it gets the more of her weight the dick offers to carry for her.

Her pussy squelched around the giant cock rolling around as she bucks on it, and her labia became a bit longer, projecting out a bit more into a deep neon pink leaf shaped pussy... like the vulva of a bovine. However, completely unlike a cow; her clit remained visible on the surface... and as her arousal rose, so did its size! Her clit started to mutate, enlarging and lengthening- but not just the part of the clitoris that is visible on the surface, the ENTIRE thing grew, which caused her mons to suddenly bloat up giant, projecting her entire pubic mound forward in an increasingly exaggerated curve! It grew to a chubby four inch cone shape on the surface- looking sort of like a dick, but her urethra did not change its position back in the rest of her pussy- so it did not function like a dick. It did still bob up and down in twitches of arousal like it was agreeing with something.

Mammary glands formed in the bubble of fat that was her proto-udder as the teats became 75% of the size of her originals. The bubble of fat suddenly had four hills, and then a definitive cleft formed between them as the muscle walls formed to help segment the four and hold their shape. Veins bulged massively around and under her belly button, projecting further out and being more numerous as they approach the base of her udder. By the time her new teats were flopping around wildly at the same size as the originals her udder segments were each bloated to the size of a honeydew melon. Her udder is now heavy enough that when she bobs down on the dick the udder lags, stretching down and then the skin tension causes it to swing back a bit between her legs- slapping her own pussy and giant clit before bouncing abruptly back into place like an elastic band!

Kaylie even started to grow still a bit larger! Oooh, she better cum soon... real soon. She is going to outgrow the entire building at this rate. She keeps growing like this she will be able to fuck the woman across the hall without leaving her room! She wanted to trust Leila has a plan, but also knows how obsessively horny she can be even without the influence of any mutations. She took the original mutagen twice herself knowing how hazardous it was just to see her own tits grow... sure she has the brains to plan this sort of thing out- too bad she is too horny to use it half the time. Her ears fluttered in pleasure, but because she has four of them she was unintentionally clapping them together lightly. Kaylie groans, her skin feels so tight from her body still trying to get even more muscular! Her skin starts to change! Faded black splotches start to appear on her! The bushy diamond of pubic fur over her sheath starts to grow longer and taller- trailing up to her navel quickly. Fur starts to sprout on her forearms too! When fur grows over a faded black splotch on her skin; it becomes solid black. When fur grows over her olive colored skin however- it grows in snow white. Her fingernails are turning black too! Ack! They are three times as thick as they are supposed to be! Nooo, don't take her ability to grab Leila's titties!

Leila grunts and scrunches her face up as the cartilage in her nose pops loudly- her nose getting wider but slightly more shallow. Oh- she is getting the same demi-muzzle Kaylie has. Yey, they match! She groans and grunts with effort trying to regain her balance to work the shaft with her rippling pussy walls, not wanting to let Kaylie's pleasure wane, but having a bit of a hard time because of a pressure in her hips and how tall the shaft has become. When she sat firmly on the dick again her hips gave a loud, hollow crack and spread her pelvis in two chunks before the bone expanded- mending the controlled break and also reshaping it into more of a V shape! Her hip bones projected out in the back into two rather bony points, which stretched her skin a bit in between, creating a triangular shaped pocket her anus now sits in below her dancing twin-tails. As long as her thighs do not reshape into a cows, she should still be able to walk on two legs at least.

The breasts on Leila's chest are starting to enlarge again too, now they are getting so big that their weight is fighting one another- causing the bottom set to divide slightly from the weight of the top set pushing down and in, giving her upper breasts tight cleavage from the lower ones lightly pushing them together. Her areola were quite bumpy now, and she could tell by how plump they look projecting out from her boobs themselves- her milk storage is filling up. She better not start leaking while riding Kaylie or this will really spiral out of control. Milk is thus far the strongest medium for the mutagen- which seems oddly appropriate given the transformation is supposed to be into a cow.

"Hnnngh- ugh, ngh...nnnnnnnngh! L-lei....hah... l-lah! C-mmmm, it's- it's!" Kaylie was trying to warn Leila that she is peaking- she won't be able to hold it in much longer, but she is still so breathless, overwhelmed by the pleasure.

Leila could easily tell it was happening without the warning luckily- the tension keeps rising. Every time the dicks throb they soften a little less in the aftermath. Soon they are so achingly rigid that they cannot throb at all, and simply vibrate with pleasure. The urethra stretched wide around in preparation, like a cannon barrel. The biggest indicator is that it felt like someone was trying to shove Leila forward... it is Kaylie's enormous balls drawn up to her groin- shoving up against Leila's butt firmly enough to force her to lean forward a bit to make room. Leila half-sat her ass on the balls, humming in pleasure at the hot smooth flesh under her butt- the front of her body still balanced fully on the shaft. The two top dicks finally became too tight and yanked forward too hard for Leila to hold and flicked free from her, flicking a gob of pre at the back wall on either side of the window a moment before all three points of her trident erupted!

Leila had to scramble to shove her feet down into the underside base of the front dicks to stand her weight up enough to let the flow of cum out- it quickly bloated the sides of her vaginal passage like a water balloon threatening to pop her! The unending flow of pre was a pretty good indication already- when Kaylie climaxed, it did not relent quickly. Each stream fired two feet through the air before arching down and slapping the floor heavily for a full second before her tri-dick buck powerfully in a half second delay and then jet the next second-long streamer. Kaylie's chest was just heaving with her fast, heavy breaths and she squirmed as her spine was arched out in a half circle, curled from the intensity of the pleasure! Her orgasm lasted a minute and a half before tapering off quickly.

Her cocks released the pent-up blood flow in them so quickly the weight of the penis alone yanked itself free from between Leila's legs. Leila chuckled but then winced and held her gut. Oooh yea, there is the ache from stretching herself out so badly. Kaylie only has one sheath still, so all three dicks share the same home. Leila did her best to grab and slide her hands up each shaft as it softened- trying to flick off as much of the goopy cum and precum before they return to the sheath, so they don't get their house dirty. Watching the testicles release looked like someone rolling out the red carpet- except the carpet in this case is the trail of loose scrotal flesh they stretched out. Are they bigger now too? It is hard to tell. Each testicle looks like the size of a giant beach ball- squashed oblong.

As much as she wanted to enjoy the afterglow- Leila immediately used her magnetic magic to repulse the cum from herself before too much started to absorb into her flesh. Luckily it's very thick and sticky, so it is not easily absorbed into anything. It sort of just adheres to and paints whatever it touches. Leila had to help Kaylie heave herself off the floor before the very slowly expanding layer of cum could roll back to touch her and self-mutate.

Kaylie wrapped a sheet around her chest, that hung just low enough to cover her sheath but not her trailing balls, which don't even clear the floor under her. She cannot walk without dragging her nuts on the ground- painting her scent onto everything she passes. This was the best she could do to cover herself to go out... there was no chance in hell she could wear any of her actual clothing- she is like seven times her previous size! Even Leila had a hard time shuffling her clothing back on after their romp. Her body is the same size as always but now her shirt barely fit over her top breasts- her teats bending on the fabric now caused the tips of them to pop out the bottom of the shirt! Thanks to the new black udder she could get her pants up, but could not zip them up or it would strangle the udder. She also could not pull them 100% up or the waist would rub the bottom of her two tails and irritate them quickly. That means Leila had to walk carefully because there wasn't much holding her pants up.

Kaylie can't even fit out of the door! She had to duck to get her head through, her neck, part of her shoulders and then got stuck. Leila just told her to smash through. The fact the mutagen can spread so easily without control makes her presence in the dorm a biohazard. Under emergency biohazardous protocols; no one is going to complain that they broke a wall. She unfortunately woke a lot of sleeping people up when she splintered the door frame and collapsed part of the surrounding wall into the hallway of the dorm. No one was awake already, so by the time they properly woke up and stuck their heads out to see what the hell happened- Kaylie and Leila were already gone.

While walking across the field back to the main building; Kaylie could barely even see Leila. Her breasts are huge and have grown along with her- retaining their comparative size. Even besides that- she is SO much larger than Leila that the tiny woman vanishes into Kaylie's shadow easily, and walks into the blind spot made by her own bust. She is also still mutating somehow! The fur is spreading!

"Uhhh, L-Leila? Why am I still changing, we got the goo off me..."

"Delayed changes- like your omniphallus only splitting with my help."

"You said your potion was too strong and then burned itself out and stopped working entirely though? So then why are these changes delayed, if your potion isn't even doing anything anymore?"

"Oh, that is mana." She turned to face her, skipping forward while walking backwards so they could make eye contact- but Kaylie could not help but look anywhere other than the black sausage-sized teats flopping around wildly. "You did not use the mana inductor in your dorm room in the last few days, ya? Just like the spell portion of my potion fizzled out- your mutations don't go without a power source. I opened the door which let some in, and now you are outside, wading through all the ambient mana out here. And soon you'll be in the university proper, where the mana basically never ends!"

Kaylie slouched even more than she already has to. "Doesn't that mean I was considerably better off staying in my dorm room? If the supply of mana was burned out completely I would turn back to normal without anyone even needing to do anything?"

"In theory, yes, absolutely. Except you're a literal giant and you'd have grown so large that you fall through the floor into someone else's room before you ran out entirely- and then you'd infect them, and then both of you would mutate on the mana from their room..."

Kaylie grunt. "Right."

The fur spread across her arms and upper body, consuming her neck but seems to stop at that. On her lower body the fur consumed her legs and hips and then stopped there. So her fingers, palms, the underside of her forearms, and her entire torso except a triangle at the top and bottom are naked still. Her entire face is bare except the bridge of her nose. Her ears look elven- they are pointed and thinner than a humans but have no mobility like actual bovine ears. Her fur does not grow in evenly either, even in the places it does cover. It grows long and wispy off her elbows, around her hooves, off the end of her tail, and embarrassingly enough- off the end of her sheath. A long majestically curled tuft of long hair-like fur from the end of her sheath. It is long and bushy on her collar, causing the tuft to sit partially in her cleavage. It is even longer than that on her neck, and even longer than that on her upper back- but the fur ends on her back where her obscenely bloated muscles also taper off. Her fingernails are blocky and black like they had started to devolve, but her hands hadn't changed at all, so her nails are still nails- they are just thick and dark. She keeps having to shake her head- she did not restrain her bushy head of fur-like hair into a braid like usual so there is nothing stopping it from sweeping in front of her eyes. Kaylie's scrotum is so long even her monumentally giant balls still have plenty of space- and they drag a good two feet behind her when she walks.

When they arrived at the school Leila unlocked the lab and they quickly slipped inside. The lab room and its doors are huge, so even Kaylie's mini-giantess proportions still fit inside. Once in the room, she had plenty of space, even as a giant. At least at this point her current slew of mutations have stopped. And since they are in the university- this means the actual changes have run out, not the mana. She is already so giant she could easily pick up Leila in one hand though. Her breasts are big on her- compared to Leila? Kaylie could smother her under a single boob. Her sheath is so large a full grown person could climb inside and use it as a sleeping bag!

It does not take long for her to start groaning from building arousal again, and then as soon as her dicks move they brush against one another which causes her erection to self-complete, and the three fat prongs start to drip on the floor again, creating another mutation hazard. Leila does her best to distract herself with the research, but she cannot help but prod her own body in arousal. It feels soooo soft and rubbery. The weight is burdensome on her but she also kind of likes it, like a constant reminder of how busty she has become. How fat and round her womanly fruit has ripened. There was also notably no Jerrik to be seen. Which means something went south, again. She tried calling his cell but he was not answering, and she is busy researching and babysitting Kaylie so going out to look for him doesn't seem like the best option, either.

The doors to the lab rattled as something huge slammed into it, then they heard what sounded like an animal pawing at it. A bit leery; Leila went over and let Jerrik in... who is now so badly mutated he cannot walk on two legs. He looks like two thirds of a cow with a bit of a human sandwiched between them. And yes- a cow, not a bull. Like Kaylie his mutations ignored his gender and slapped cow traits on him in spite of him being male. Leila immediately tried to question him on what exactly happened so she could perhaps be more inspired for her next potion attempt but he only lowed at her. Oh... his voice is completely gone, he can only moo now. Welp, not getting answers from him then. He also kept rubbing his butt on things... it must be driving him nuts with hormones too, except... what the mutations did to his genitals were not kind. He could not really have sex even if he tried, at least not like how he is used to doing it.

Kaylie was already spaced out trying her best to void her thoughts- knowing if she actually tries to think about anything it's only going to be pussy and tits. Those cute twin tails lashing around over Leila's ebon butt, the clap of her ears when they unintentionally flick together... that soft rubbery black udder flopping around... those giant teats and wobbling boobs. But then when Jerrik entered she looked at him and her dicks bobbed! But Jerrik is a guy! She doesn't like guys, even before the mutation she had zero interest in guys. The thing is... he doesn't really look like a guy anymore. He has four testicles but they are so swollen large they match the shape of his cow udder almost exactly, minus the teats. He has a penis but its buried between udder and balls so you can't actually see it, at all. Both his butt and head are entirely a cows- so he doesn't look like himself at all. And his body is so lopsided his butt is presented to everyone unintentionally. Even the MAN in the room has giant tits! How can Kaylie contain herself?!

Leila smirked and offered him some help toward the back of the giant room, motioning to Kaylie who is also extremely horny. "Seems you two mutated to have a fix for your own problems"

Jerrik snort in resentment, but then started to shuffle in place, needing release, then looked to Kaylie. Hearing someone address him directly snapped his conscious thought back, but the hormones distanced his thoughts so far that he immediately fell back into the void between thoughts. Rather than think of Kaylie as Leila's lover, or even a person- all he could think about is how savagely she could slam one of those meat pillars into him. When she has an orgasm; do they cum individually? Can he ride them all separately? Will the storage of cum for the first dick regenerate by the time he rotates back to it?

Kaylie just crossed her arms. "Ugh, n-no! I mean, no offense but... I... feel weird about doing it with a boys... hole. And I barely know him!"

She did not want to give in to these... obscene cocks. But they feel so good, and her balls are so demanding, so, so very full and heavy. And Jerrik looks so small and pathetic down there, so delicate, hmmm, and jiggly. At this point Kaylie herself looks a lot more masculine than he does. As much as she tries to not think about fucking him... she really can't fully consider him male in this state... and she likes females.

Leila laughed. "Oh, is that all?"

She rummaged a bit to find a book of transmutation and then motioned to some of Jerrik's planters. She distilled a rubber from the plants into a floating globule and then traced the complex runic array from the book to re-forge the rubber, and she formed a sex toy in her hand, rolling it down the table for Kaylie to take!

Leila shrugged. "Given the situation we are in- I think most societal norms go out the window. What happens in these forms stays in these forms, or something like that." She motioned to her gargantuan testicles. "No one expects you to act like yourself with THOSE between your legs. Consider this a free pass to do whatever the fuck you want."

The toy is an absolutely giant bull dildo! But... rather than fake balls and sheath at the end of it, there is a cow vulva. One side is a dildo, the other side is a fleshlight! One side penetrates Jerrik, the other offers a more acceptable hole for Kaylie!

Jerrik was too horny to even consider the appropriateness of the situation and scrambled across the floor to get to the dildo, stopping so abruptly the weight of his udders swinging forward caused him to accidentally slide another foot across the floor- his hooves unable to get traction against the tile. He did several frantic hops at the table, then slammed his jaw against it and did a few more hops- trying to get off the floor to grab the toy, but he cannot lift himself because of how lopsided his body is- he can't get the toy himself.

Worried he was going to hurt himself trying to get to it, Kaylie stood fully to help. Her giant balls made a loud sweeping sound as the loose flesh dragged across the floor. When she bowed forward to get onto her feet, her tri-cock brushed the floor, connecting three glistening lines of pre to it. Her sheath is not fixed to her underside like a bull, so the weight of her cocks forces them to jut straight out from her- too heavy to hold themselves upright. Kaylie could not reach the toy without also unintentionally prodding Jerrik with her trident. He immediately froze when he felt the hot dick meat brush his flanks as one dick wedged under him slightly- beside his udder, one on his left and one on his right so Kaylie could reach far enough forward to pick up the toy for him. Leila said it was fine, no one else would know. She could use that rubber bovine pussy to plow into this cute little cow. She... can't think of anything else... including a reason to hold back.

Jerrik's body practically vibrated in anticipation, Kaylie slid the toy in for him and Jerrik backed up to ram it in fast and deep, but because he is so lopsided he staggered back further than he intended, once again causing her dick multitude to gently prod him. Kaylie looked at the soft rubber vulva now where his anus was- the reverse side of the toy waiting for her. She sweat, breathing heavier. Kaylie glanced at Leila, but Leila was re-absorbed into her research, and that research was desperately needed to end this. Jerrik rammed himself back, staggering a bit again, parting her dicks as he stumbled closer to her. She grunt at his fumbling around and shoved him forward again by the dildo before rolling her hips forward to lift her mighty cocks again. The bouquet of dick tensed, the shafts becoming so rigid the inner cock felt like it started to outgrow the skin encasing it, causing the shafts to bend! All three dicks hugged one another, forming a tight spiral of cock flesh! A single giant phallus shaped like a screw!

Kaylie's giant hands slammed into the floor so hard on either side of Jerrik that the giant table in the middle of the room bounced a half inch off the floor from the impact! Without turning his head, he could see the spiraled horns bow low enough to be on either side of his own head. The dildo gave his anus the landscape of a pussy, and Kaylie's tricock stretched it wide, stuffing him more full than he has ever been, and all of it dick! Heh, going to tell her to not be lewd in the lab now, Jerrik? No, she didn't think so.

Eventually Kaylie got tired of trying to thrust into him like this and grabbed Jerrik as she flopped back onto her ass- lifting his bovine form up like he himself was just a sex toy! Instead of thrusting into him, she lifted him up and down on her shaft- her grotesquely massive muscles allowed her to easily lift his entire body like it was nothing. When she bottomed out into him, her balls lurch forward and bounce off Jerrik's udders before she lifts him again! In this position his udders hang and push his balls back so Kaylie's shafts brush along the smooth scrotum first in order to get into his butt. Jerrik started to make breathy lowing sounds- not even aware he was doing it.

Both of them were too busy enjoying the pleasure and frantically rutting that they did not even consider the fact that their fluids are both mutagenic... but not mutating anything. For some reason they are incapable of mutating one another. It is a good thing too- because Jerrik is slathering the underside of his udders and the front of his balls in precum unable to escape the immediate area of his penis. Kaylie ejaculates precum so regularly and in such volume it looks like she is having an orgasm perpetually.

Having his prostate absolutely smothered against Kaylie's hot shafts made Jerrik cum explosively! The cum built up in the pocket between udder and balls, inflating it like a balloon before the pressure lifted the udder enough for it all to explode out from between them like a shotgun blast! Kaylie lasted longer- but not by a lot. Her giant balls crept closer and closer, causing all the empty scrotum to scrunch up under them instead of draped out above. They hugged Jerrik's udders tightly just before she came! There was no opening in the toy on the end- but the force of the cum quickly made one to explode out into Jerrik. He was winded again and squirmed a bit from a bit of a cramping feeling! She stuffed him with her hot sticky love like a jelly filled doughnut!

Her many penis were again not able to hold the pressure long- so they turned flaccid very quickly once she came, and her senses snapped back as well, causing a flash of embarrassment as she pulled out and away. Jerrik shared that sentiment; immediately wondering what the hell he has done. With their balls empty; the two of them would have clear heads for a short while anyway. Jerrik has four balls that pump estrogen and Kaylie has two colossal balls that pump testosterone- they won't have long till they get aroused again and their thoughts devolve to base instincts.

After tugging idly on her giant teats the whole time she was doing her research- Leila already knew what she would do and was practically vibrating in her seat by the time she completed a dose- and then immediately drank the entire thing.

Kaylie looked a bit worried at her. "W-woah, wait if you..? Won't that make you even more cow?!"

Leila grinned. "It shouldn't mutate me any more than I already am, but... it will enhance what I already have, yea."

Kaylie looked down to Jerrik who was lowing and making muttering sounds. "So... why does he sound so worried?"

Leila shrugged, then shivered and quickly clutched her lower breasts as they started to firm up and swell. "P-prob...mmm, probably be-heee-cause I will grow too big on a dose that large to be able to make a reversal elixir."

Kaylie froze a moment, realizing no one was working on a cure. They were working on a stable mutagen- not anything that would actually cure mutations that already happened. No one was researching a CURE.

"Wait, so then we are stuck till someone else comes to save us?!"

Leila was convulsing from surges of pleasure and just barely managed to point to a mixing and steeping unit across the room that is currently running. Oh thank god, she isn't quite that irresponsibly horny. The cure was simply an elixir that would stabilize the mana levels in their body- so the mutagen wouldn't have enough energy to maintain any of the changes it is trying to inflict and they fully revert. But... it is still being mixed by the machine. Leila could not even wait long enough for it to finish before bloating herself larger! Her udders and breasts, even her nipples grew to absurd sizes! She exploded milk across the room, destroyed the stool she was on in spite of it having metal legs, and then even destroyed the giant table under her expanding weight! Watching her was hypnotically arousing... Kaylie wanted sooo badly to stuff one of those colossal teats into her mouth- and even at her enlarged size; she would have to STUFF it to get it into her mouth. So much... fat, bloated flesh. Rippling, jiggling, wobbling and bouncing. Supple and smooth, rubbery and soft. Kaylie started to get a little dizzy with arousal from watching how obsessively Leila enjoyed her own flesh. She could not join in the fun though, or she would risk them both mutating worse. Ugh, torture. Leila did not stop swelling till she had filled a third of the entire room. And the room is enormous- Kaylie is a literal giant and she fits just fine.

Well, it all worked out in the end. It fell on Kaylie to save the day- she is the only one who could go get the elixir from the machine when it is done. Jerrik cannot get up off the floor, he is stuck on all fours. Leila was giggling like a drunk and humping her own bloated tits like she had gone rabid. The mutated forms melted away like colored vapor so quickly that Jerrik and Kaylie practically fell out of their transformed selves.

Oh, but Leila? No. They have the cure, they have the completed transformation potion... no real reason for her to turn back immediately, right? Why waste a good thing? Leila managed to bullshit her way into getting the university to rig her up to a milking machine in the lab where she remained for a full week in her extremely bloated super-cow state. She lactates what is essentially just an exact copy of the original mutagen, and they had used all of the original samples to make their research, so her excuse to the university was simply; she is restocking their research material.

Oh and Kaylie had SO much fun visiting her frequently. She did not have to pay for meals for a whole week- just stretch her jaw around one of those gargantuan black teats and fill her gut to bursting with hot, fresh milk! And the mutagen? Not a problem when she has the elixirs on hand to turn back whenever she needs. Now mutating was FUN, because she can easily turn back so there is no lasting consequences. Chug a gallon of hot milk straight from her lover's tits and then sit back and see what wacky-ass mutations it gives her THIS time. Even getting to the milk is hot. Her udders and boobs are all so large that Kaylie needs to climb them to reach the teats, sitting on the gigantic boobs, feeling tiny compared to her lover, like she was originally supposed to be. Yea, for at LEAST another week- they are going to milk this experience for all its worth.