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Classroom Hallway

Upon reaching the second floor, an acrid musk wafted through the panicked crowd. Slimey, glossy fluids coated the spacious, once-sterile classroom hallways from the ceiling to the floor - the stench was sickeningly potent. Worst yet, there was already a large handful of anthros occupying the area, 'playing' with some of the humans. Any people that had run up here first seemed to have already been captured. A pair of female squirrels were servicing a poor guy in one corner; in another corner, a lady's insides were getting rearranged by girthy tiger cock. Interestingly, the majority of the monsters were either satisfying themselves or each other, perhaps due to the absence of suitable prey.

However, fresh meat was arriving and fast. Students were piling in, screaming from the foyer below, and were rapidly gaining the attention of the insatiable creatures. Chase and the others had just reached the main hallway when the furries had begun their attack, forcing them to continue dragging their exhausted legs in a desperate attempt to flee again.

"C-can we please find someplace to hide??!!" Ginny wailed.

The nine were frantically searching for any possible spots of solace. All the classrooms that served as saferooms were filled up and locked in, the unlucky ones were getting ravaged inside by any furries that managed to sneak in.

Chase's eyes lit up, "over there! Head to the storeroom!!"

Zane was the first one there - without hesitation, he flung the door wide open and rushed inside. The rest of the group followed suit, along with a few other desperate students. Ty tried to let in as many fellow students as possible, but the chivalrous act had caught the attention of a busty calico. She pounced at the door, salivating all over her humongous tits at the thought of having such a meaty treasure trove all to herself. He managed to shut the door just in time, but it appeared something on the cat anthro had slipped into the storeroom - an orange beret.

Laboratory Storeroom

The storage room was fairly big, providing more than enough room for everyone that made it inside and holding a wide assortment of laboratory chemicals and heavy equipment that were supposed to be used in the classrooms across the hall. Ty, Chase and Keith all held down the door that the now furious feline was scratching endlessly at. Once the group had blocked the entrance with enough shelving and the anthro cat gave up, they all finally relaxed.

"I-I really need to take a b-breather...." Chase wheezed. His legs were shaking like crazy, he could barely stand anymore.

Ty was also equally as tired, the stress and anxiety of the situation had finally caught up to the usually happy-go-lucky guy. Chase had never seen him look so... defeated before.

Ginny was already on her next panic attack. "HOLY FUCK... HOLY SHIT... HOLY FUCKING SHIT!!!" She cried, "WE'RE TRAPPED IN HERE!!!"

Carmen snapped onto her, hugging Ginny tight to try and calm her down. "No no no baby, we're gonna be fine here, alright? Once the faculty get their shit together, this will all just blow ov-"

"The faculty aren't coming..."

The group all turned to Harriett, who was on the floor straining to hold back tears - the orange beret that slipped in earlier was clutched tight in her hands. "Professor Yvette.... This was her beret..."

Keith was looking even more agitated than usual, "but that would mean... that monster was...."

Harriett's silence spoke volumes.

Chase's face went pale for a moment. He recalled his time speaking with Prof. Yvette, she was the one who had brought Harriett on as her assistant. She was always so calm and sweet, with a brilliant mind that could never stop making new breakthroughs. To have seen what she had become, that wild beast incapable of reason - a slave to her own insatiable lust... it was depressingly heartbreaking.

"Y-you can't be s-serious" Sam replied, "t-there's no way..."

"No, I think she's right," Chase retorted, "after all, we just watched our teacher turn into one of those freaks..."

"So those 'things' out there used to be our teachers?" Bella pulled out a blunt and lighter, "heh... no way I'm doing this shit sober."

Carmen approached Harriett, wiping away her tears. It pained her to see her friend look so depressed. "There's gotta be another way out of this..."

"There is... we'll just have to evacuate ourselves."

This perked everyone's interest. Harriett continued, "As an assistant, I've been given access to the building's crisis room in the midst of an emergency. So long as we reach it, we can escape and let in the Biohazard Squad to contain the monsters."

"Can't they just come and help us now??" Ty asked, clearly pissed off by the arrangement.

"That would risk potential biohazards getting away. They either await an evacuation response from the safe individuals in the crisis room, or let the outbreak starve itself out in lockdown..."

The news was helping Ginny return to her cheery self, "so, all we gotta do is reach that crisis room, whilst avoiding who knows how many monster furries?"

"They really stepped up the difficulty this year, didn't they?" Bella joked, bringing out a few chuckles in the group. Morale was beginning to pick up now that an actual plan was being formed. The eight were all chatting about what route would be the fastest to their destination...

Wait... eight? Weren't they nine? They all quickly searched for the missing person...

"Where the hell is Zane?" Chase asked.

"G-g-guys...." Zane called out weakly. He was leaning on one of the shelving units across the room from them. However, he looked incredibly tired - and his face was looking terribly flush.

"I-I-I.... Ooooohhhh... I don't... f-feel so... goooood...."

Zane collapsed to the ground as his body... began to grow. His expensive streetwear was looking more like distressed fashion as burgeoning muscle tore through its rapidly tightening containment. "Haoooh... t-tight..." he groaned, using his now bulky hands to remove the stringy fabrics that constricted his torso. Now half-naked, the others watched in horror as their friend's change progressed - his upper body swelled as it packed on more and more layers of powerful muscle. His abs and pecs were enormous and bulged with overwhelming strength. Soon his arms had grown even bigger than Ty's! Throughout this transformation, Zane's grunting was becoming louder and deeper, drawing in the attention of other students.

"AAHH!!!! What the fuck is wrong with him?!"

"He's looking just like that professor from earlier!!!"

No one amidst the friends wanted to say it aloud - that would be accepting this absurd reality. But the comments from the other students forced them all to confront the truth.

Zane... was becoming one of 'them'. They needed to get out.

But Zane didn't care, he wasn't even listening to the growing concern resounding about him. He was completely focussed on the transformation. Hazel fur had started sprouting all over his torso. His designer shoes burst to shreds as his feet rapidly expanded out, the toes fusing and calcifying to form a heavy pair of cloven hooves.

His trousers gave way to sturdy legs, they grew longer, thicker and pulsed with power... but another pulsing sensation was arising deep within his crotch. The fur reached his clunky hands as they fumbled at his belt, he could feel the tips of his fingers growing and hardening into dense blocks of keratin. The increasing pressure in his crotch was becoming unbearable! Zane groaned with satisfaction as his hoof-hands finally undid the tightening buckle. With ferocious strength, his hulking muscles tore away what remained of his fragile leather pants, freeing the source of his discomfort.

It was gigantic. Zane's eyes widened as he gazed upon his dark throbbing, girthy, erect member. The shock from the sight jolted Zane up standing, revealing a black horse tail shooting out of his behind; forcing him to awkwardly balance atop his new hooves. "Uurgghhhhh.... W-w-whaa... what's h-happening to meeee?" It seems the shock had brought him back to his senses.

He looked to his friends and saw the panic and distress across all of their faces as they desperately tried to force the shelving away from the entrance. Zane wanted to call out to them, beg them to help him - to fix him! But all that came out was a resounding....

"NNNNNEEEEEEIIIIIIGGGGGGHHHHHHHH!!!!!!!"

Did... did he just neigh? Like a fucking horse?? No- no, that's crazy - Zane was a human....

Right?

The existential crisis was cut short. His cock was calling, demanding him to touch it - he NEEDED to touch it. The tip of his equine appendage flared up in response to the caress of his thick hand. God, it was so big - he was barely able to get a hand around it.

"Haaaahnnn... ooohhhoohhhh..." His moans grew even louder as each stroke of his shaft sent intense waves of pleasure shooting up his burly body. The growing panic around Zane was completely drowned out again, all he could think about was how amazing it all felt. He hadn't even noticed the changes were beginning to surge back once more.

A heft was beginning to grow below his manhood, his balls were swelling fast, matching the rhythm of his cock-strokes - bigger... and bigger....

"OOOOhhhhh.... Gaaawdddd...." They had reached the size of large apples at this point. The feeling of his sack stretching and thickening to accommodate his largening nuts was euphoric - driving his whole body to swell in size once again!

"Sooo.... Gooooood!!!! F-fuuuuckkk! Urghhhhh.... C-cloooosssse...." Zane could feel a new pressure growing around his face, and deep within his shaft. It was coming. HE WAS CUMM-

"ZANE!! STOP RIGHT NOW!!"

The order shook the man-beast, interrupting his pleasure session. Immediately, he looked to find the one responsible for cutting his 'fun' short. Zane's view was almost entirely obscured by the girthiness of his horse cock; after some repositioning, he could look down upon the puny human that dared interrupt him.

Fear and disgust was strewn across Chase's face. Why was he looking at Zane like that? Was something wrong with him? No... Zane felt great! "Huuuggrrrhh?? W-why..? Feelss... Ooohhhh... gooood...."

"Zane, I-I know you're still in there somewhere... p-please... just listen to me..."

But his pleas were falling on deaf ears. Zane ignored his best friend, choosing instead to return his focus to pleasuring himself. Chase could see the brown fur spreading up Zane's face, the hair on his head lengthening down his neck into a thick black mane - his nose and mouth elongating and darkening, becoming a horse's muzzle and completing his anthro transformation...

His grunts and neighs were louder than ever before, as he edged closer to climax. He grabbed his cock tight with both hands, and stroked faster from the base all the way up to his puffed out tip, dripping with pre-cum.

The sight was disgusting to Chase, "C'mom man! You've gotta fight this, we... I can't lose yo-"

Chase suddenly felt a powerful force slam right into his abdomen, sending him flying into a nearby cabinet - shattering the glass and drawing everyone's attention...

Except Zane. He returned his pulsing arm back to the matter at hand. He was so close to orgasm... it was driving him crazy! The cum was sloshing inside his ballooning testes, begging to be released.

"CHASE!!"

Chase weakly attempted to get back up, the assault from his former friend had clearly dealt good damage. Keith ran over and pulled Zane away from the Horse anthro's proximity. "Doesn't look like anything's broken, he might have some internal bleeding, though" he mumbled whilst inspecting Chase's injuries.

"....r-run..." Chase muttered, but Keith didn't understand. Chase slowly pointed at his former friend, who's masturbating became even more ferocious. Zane was staring dead straight at the growing crowd frothing at the mouth as his moans had become feral roars.

Keith's face paled as he finally understood, "h-he's aiming at the entrance!! EVERYONE... RUN!!!!"

"UUOOOOAAAAHHHHHHHHH!!!!!!!Oooohhhhhaahhhhhhhh!!!!!"

It was too late, Zane had climaxed. His thunderous orgasm rocked the entire storage room as a massive load of seed shot out of his magnum horse cock. The white stream arched through the air...

And hit a group of students near the entrance, forcing everyone to disperse from the impact site. The unlucky ones near the edge of the crowd were all splattered in hot, thick semen.

A female student screamed, "WHAT THE FU- OHHhhh... mhmmAAaaahhh...." but she couldn't even finish reacting as her chest suddenly ballooned out of her drenched blouse, leaving a hanging pair of squishy, lactating tits that were rapidly beginning to grow feathery....

Strangely enough, these changes were continuing to sprout in other people. Everyone that got hit by Zane's load began to grow - butts ballooned out, absurdly fat cocks were bursting out of tight pants, leaving huge nutsacks to sway in the open. Bigger breasts, bigger asses, bigger cocks.... Bigger EVERYTHING! Deep, carnal moaning filled the air like a twisted orgasmic symphony as the mass transformations progressed...

Moments later, they had developed more animalistic appearances just like Zane had mere minutes ago. Soon enough, the horse was no longer the only sex-crazed anthro present with the room. Mammals, lizards, fish and birds were all popping up over the storeroom, pouncing on any human students they could get their paws on. The hideaway had become a hellscape for some, and a paradise for others...

"HOLY SHIT.... It's spreading???!!!"

"LET ME OUT!!!! PLEASE, LET ME GOO.... NOOOOO!!!!!"

Keith trudged on over to rejoin the group whilst keeping Chase up. The two moved quietly, sticking close to the edge of the room to avoid grabbing the attention of any rabid students enjoying their transformations. In the chaos, Ty was able to pry open enough room for him and the others to slide out of the room.

As the two approached the door, Chase took one last painful look at his best friend. It hurt, having to abandon Zane - but the mad lust in his eyes as he joyfully fucked fellow students with his dark, veiny lovestick showed he had embraced his new form. There was no going back.

"C'mon guys!! Grab on!!" Ty beckoned. He was holding out a hand through the small exit. Chase and Keith could see the rest of the group frantically checking for any lingering furries whilst they stood outside. The two were close, Chase was just a few steps from escape...

"Ch-Cha...se..."

The horse now had its sights set on the pair. There was still a student, halfway between owl and human, having the time of her life stuck firmly on the end of the horse anthro's length. Zane flung her off dissatisfied, leaving the growing owl anthro as a quivering mess. Once again, he began stroking himself as he faced the pair.

"Chase... st.. ay.... UroooOooOoh, we... feeeeel.... So.. Gooood... Furrgghhh...EEVVVERRR!!!"

Zane's climax unleashed a wave of cum that rose high above Keith and Chase! Soon, they would be covered head to toe in equine ejaculate... and start their own transformations. They were close to the exit, but not close enough - Ty could already tell, the terrified looks on Chase and Keith's face said it all.

(What kind of monster am I gonna beco-)

Ty suddenly fell backwards as Chase shot through the door gap straight onto him! It all happened so fast, no one had time to register a response. Chase turned around, looking back desperately through the gap at his friend, "KEITH!!"

"YOU-"

Keith couldn't even finish. Seconds later, Zane's load had washed over his whole body. The weight of the fluid pushed the student onto the floor. This display had quickly caught the attention of the 'others'. the anthros immediately began piling on top of him, attracted by the musk of Zane's heavy load. They tore his smart casual to shreds as they all had fun with him. Soon enough, the orgy began to frenzy as the owl anthro from before slammed into the shelving near the open door - shutting it tight, and sealing Zane and Keith's fate inside.

Classroom Hallway

"NO-NO!!! KEITH!!!!" Ty cried out as he pounded on the door. He wanted to tear it down badly and free his friends, but after what they'd seen - he knew doing so was completely futile. "FUUCKKKK!!!!"

Chase was despondent, clearly in shock from everything that went down in the storeroom. Despite her own grief, Harriett tried her best to console him, "What happened?"

"K-Keith... h-he... he pushed me out. He saved my life."

A long silence carried through the group. They had just lost two friends to... whatever the hell was causing this insanity. No one knew what to say - how could they?

So, they decided to press on. They were dejected and traumatized, but they had their mission - they had to make it to the crisis room. There was still hope!

It was their only hope.

Laboratory Storeroom

Back inside the storeroom, Keith's screams were easily getting drowned out by the cacophony of pleasure happening all around him. His entire body was getting 'treated' in some way or another by an anthro either partway through or fully immersed in their own transformation...

A snake had her long, forked tongue wrapped around his modest dick, she took his entire length as she sucked him dry with her throat-pussy, all whilst trying her best to avoid pricking his hard-on with her newly grown fangs.

Hard-on? Was this... turning him on? No. It was repulsive. Obscene. Completely inhuman. But then...

Why did it feel sooo... gooood?

The other animals didn't relent either, the way they all kissed and licked all over his body sent shockwaves of pleasure shooting through him. He drank deep from the leaky bosoms of a hovering buxom birdie, or was she technically a mammal? With the massive mammaries and all. Either way it didn't bother Keith, the creamy taste was nonetheless addictive. He almost felt... safe, embraced in the warm caress of fur, scales and feathers that they enveloped him inside.

Why was he running away from this?

His self-questioning was interrupted by a powerful warmth that pressed against his bare back. Keith turned away from the teat to look upon a massive, erect, equine cock that towered above him. A drop of pre trickled from the tip of Zane's flared cock right onto Keith's face - it desired satisfaction.

Zane whinied, "Ke..ith... feeeelss.... goood?"

For a minute, the simple question shook Keith to his core. He was a serious, straight-laced, studious guy - this sort of deranged activity.... it wasn't him! It couldn't be him!! He didn't want to like this!

(NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME. NO. I HATE IT. THIS ISN'T ME......)

........

He loved it.

Each and every second of was absolute bliss, it felt like it was never gonna end - he wanted more.... NEEDED MORE...

Keith's tongue began to grow longer as it lapped up the split pre-cum on his cheek. The taste alone almost made him cum as his body rapidly began to expand with muscle. He gazed at Zane's cock with lust-filled eyes, and an increasingly toothy grin, with only one thought on his mind...

(What kind of monster am I gonna become?)