New product...

Hey doc, what are you doing now?" asked Mark to his professor and, as he was just looking in his office, he was just with a needle with his new substance inside, as he looked at him with a cold and neutral look, almost like he was just focused into the needle.

"This, Mark, this is a new product that will be launched on market in a few months," Dr. Calius said to his colleague and student as well, he just looked at the needle and then cautiously, he just placed it in the table, he just patted him and continued, "this will reshape humans’ bodies in ways that can only say... exciting... and attractive as well," he said to Mark as he just looked at it with a sense of curiosity in his face.

"Really, doc?" he asked as he looked at this, as he had the idea of the new and the thing that the company Dr. Calius had been working had developed a serum that promised physical transformation, such like improvements, but he wasn’t sure it was true or not.

But then, the doc confirmed looking at the needle with the green liquid inside.

"Yeah, Mark, this could make every single human transformed, improving with a new being that could possibly with intense surgical beauty treatments," Dr. Calius said with a smile as his breath accelerates and his heart beating like a drum as he was just about to taste this product.

"And what do you gonna do now, doc, what do you?" he asked to the Dr. Calius as he looked at him with a sense of curious urge on face, as his growing body was just there stood and then he just looked at the needle and took a pause.

"Well, I need to taste this formula," he said and he just marching, "would you like to be one of the candidates?" he asked his colleague and student as Mark watched him with a look of suspect about this?? "Whoa, so there are not testing the formula yet, doc?" Mark asked to Dr. Calius in deep surprise.

"Yeah, well, been treating this formula and the results... are... excited... absolutely outstanding, Mark," he said, his voice changed into a charged with excitement in response as his body was just running with excitement, almost like he couldn’t wait to taste this.

"Ehn... I don’t know, doctor, I’m not yet sure to this formulas," he said with a smile of hesitance, as he was growing nervous as Dr. Calius was just rolling his eyes in disapproval.

"Well, looks like you have not sensitivity to come and taste this wonderful formula," he said and then he just prepared to hit the needle and then he said, "however, I’m ready to do this," he said and then he plunged the needle down his arm, as the green formula was inside his veins.

"Doctor!" Mark said with shocked as he looked at the green liquid form filled his veins and Dr. Calius was smiling and shudder in response.

"Just wait and see, Mark," he said, breathing and gasping as his body was feeling running throughout his entire overweight and fifty-something year old physique, his face was flushed as well, his body trembled and continued, "this... will be the beginning of new era in human improvements," he said gasping as his body trembled, a wave of arousal washed over as his cock was stirring inside his pants, making him.

"What happened, doc?" Mark asked to Dr. Calius as he was just in suspense and he could see the big tent formed between his legs, making it clear the arousal that he was experiencing about right there was result of the needle.

"Oh... nothing, Mark... it’s... it’s... oh god... it’s just the effect of the formula... remaking... flowing... my body... oh god," he moaned as his body was just being formed, the sensation to that entire sense of completely lust that was flooding in his veins, making his cock painfully erect, and he couldn’t help himself as he said, "oh fuck, I’m so... so horny," and then he just didn’t want waste any time and then, he unzipped his pants and revealed his big hard cock, and... started stroking it with reckless abandon.

"Oh my gosh," Mark whispered as he looked at the respectable Dr. Calius stroking his cock with reckless abandon and shamelessly, as he was just completely overwhelmed by the intense horn flooding into his system, as his body trembled as result.

"Oh fuck... I... I need to stop this... but... oh fuck... it’s too good... too good, ohhh," he moaned audible through his office as his body trembled, sensations sending shocks of pleasure washing over him, sweeping away his thoughts and his restraint, just overwhelmed by intense desire to just stroke his cock and finally get off like his oversexed mind was craving right now.

"Looks like the needle had a severe heightened in the arousal," Mark whispered as he looked at the Dr. Calius as he was rocking with reckless abandon, his moaning, and acting like a shameless being as his body trembled, and then there was just like he was about to experience such sort of magical moment.

"Oh... this... this... is... oh... oh, oh, OHHHHH," a huge grunt escaped from Calius’ lips as his cock erupted with just intense spurts of hot seed, making his entire body tremble and convulse with mind-blowing orgasmic waves assaulting his body over and over again.

"Oh my god," Mark just watched with shock and a sense of that was something insane about to happen now, as he looked at Dr. Calius moaning and cumming over and over again, as his body was in such a sea of maddening mind-blowing lust reshaping his whole sense and making him unaware of the entire change happening into his entire body.

"Oh dear lord..." Mark whispered, watching Calius’ body reshape in front of him, as the pounds and pounds of fat from his torso vanished, the pounds of unappealing fat melted away in mere seconds, that, leaving a slim torso in its place. And then there was a swelling in his chest, the ones that were growing at a steady pace.

"Oh god," Mark whispered, watching the growing buds of Dr. Calius’ chest growing from what appeared to be an A cup, to then a B cup, and then a C ones, as the sensitivity grew that area, and the growing got a D cup, then breaking as his nipple thickened and his areola expanded, and then, finally reaching to an EE cup breast, so perky that strained the fabric of his now loose shirt, as the buttons gave up, burst, and then, exploded the big titty full flesh exposed.

"Wow," Mark was growing with excitement, shock, and... arousal watching the big, perky mounds of titty flesh from the now slim chest of Dr. Calius’ torso, as his body kept changing, such as his fat wrinkled face reshaped as well, the fat around his face melted away, along with the crow’s feet, pimples, and wrinkles, leaving his face smooth and decades younger, as his eyes adopted a vapid look, his eyelashes grew longer and his eyebrows thinning out, and arched, as his nose turned into small and cute ones, as his cheekbones lifted, and his lips plumped, and turned into a kissable and red caramel lips. His jaw refined as well, giving a sexy and feminine face of a young girl... and his balding hair growing lustrous hair, then turned into a lustrous mane of hair cascaded past his now dainty shoulders.

"This... is... unbelievable," Mark said as his cock growing erect inside his pants as he watched, shocked, the Dr. Calius’ body continue to shape, as his arms losing the fat flabby look, and turned into slim and feminine ones, as his hands resmall, the calloused look vanished, leaving smooth and soft look, his fingers slimmed down as well and got longer and adopted a polished pink polish, turned into a dainty and well-manicured hands. As his bones reshaped as well, the cracks and pops audible as his height reduced a couple of inches and his waist shrunk, and his shoulders narrowed, giving a feminine look. As his flat belly as well, the rolls and rolls of fat disappeared in mere seconds, leaving a smooth and flat sexy belly in its place, his neck reshaped slim one as his Adam’s apple receded into nothing... changing his moans into a high-pitched, almost girlish ones.

"That serum is... incredible," Mark whispered as Dr. Calius was still cumming and cumming, as his body changing, as his hips reshaped as well, the gaining sexy feminine sleek and softness, turned into a sexy sleek legs, as his thighs filled out, turned smoother and toned, and with a gap between them. And his butt reshaped as well, filling in feminine muscle and womanly softness, turning rounder and tighter, becoming a heart-shaped derriere that everyone would love to smack.

"Oh for god’s sake... look... look at him... or hell... look at her," Mark said with shock, shocked look and delight, as his cock formed a tent between his legs, watching the stunning feminine physique, the woman that used to be Dr. Calius, but there was just only one single remain left of her old identity, as his cock, the one was shrinking by inch, turned smaller, softer, and pinker, turning a clit, as his balls receded into his shaft, leaving just but a flat slit in its place.

"OHHHHHHHHH," a high-pitched cry escaped from her lips as her pelvis churned, the testicles turned to ovaries and the prostate reshaped, expanded, and turned into a womb, and the sperm turned into eggs, functioning her fertile and feminine reproductive system, finishing the change.

"Oh dear lord... that serum is amazing," Mark whispered, shocked, watching the hot young girl, probably in her twenties, that used to be Dr. Calius, as the clothes were just awkward on her stunning young shape, as she stumbled on the floor, breathing hard, gasping, as she was slowly returning to her senses post that insane change, reshaped into a hot young being.

"Oh... OH," she gasped, breathing for air, her eyes only opened, she just tried to intuit upon what happened, she turned to see her new body, it was different from one of the best orgasmic experience of her life, she never pictured all something like this before in her life.

"Oh... I... this... it worked, Dr. Calius," Mark said to the girl who was slowly turning to her senses, she tried to stand from her feet, but that was difficult, her body was still sore and exhausted from the intense mind-blowing orgasm, and she...

"Oh... what... what happened?" she whispered as she finally stood on her feet, her legs trembled as her loose pants fell off, leaving her sexy legs and her tight slit fully exposed, she looked down to see her big sexy mound of titty flesh...

"What the hell..." she gasped, watching the big perky tits, as her nipples throbbed, begging for attention, she instinctively cupped them and moaned in response.

"Oh god... it... it worked," she moaned loudly, a sound like a satisfaction that she just completely done her job and finally got what she wanted, the serum had worked, she looked on to her stunning body, there was not a single thing from her former middle-aged male look, but just a stunning young girl...

"It worked, Dr. Calius," Mark replied to her stunning girl who looked at him with a smile on her stunning young face.

"What... this... this is amazing," she said gasping and moaned as well, as her pussy was tingling, aching for stimulation, almost like a lust to make her horny, as she then watched her young form, ripped the loose shirt and revealed her body fully exposed...

"Oh... I’m... I’m perfect," she moaned, there was not a single hint of aging, or imperfection, just pure hotness, like her body was made for being exposed and admired by everyone.

"You look like a twenty-year-old girl now, Dr. Calius," Mark said as he was just looking, giggling in response instinctively...

"Dr. Calius? Wow... that was just such a boring and bland name..." she smiled and with a wink as she then continued, "I need a new name now, one that fits me perfectly... how about... Dina?" she said as she teased her nipples, sending electric jolts shiver through her sexy body, making her legs tremble in response.

"Dina? Sounds... well... good," Mark said as he was horny and his cock throbbed hard, making it difficult to hide the tent between his legs.

"Looks like somebody is enjoying this as much as me, aren’t you, baby?" Dina giggled and winking closer to him, she looked at the tent between Mark’s legs, his cock, as she shuddered and with the idea of sucking a blowjob in her head. She couldn’t know why, but her head was filled with images of sucking hard cocks, making sprayed her with sticky cum, and impaled by hot studs... it was one sort of completely desire that made her just accept and begging to be satiated... it was a side effect of the serum had skyrocketed libido, turned the once middle-aged doctor into a horny young slutty girl.

"Ehm... I’m not... Dina... I’m ehm..." Mark was showing with shame and hesitation at this, unable to just doing something as Dina neared closer to him, and then, she groped his erection through the fabric of his pants, making him moan.

"Oh, baby, you’re just... horny, aren’t you?" Dina grinned to him as she just completely got to see her once colleague, student as well, moaning and couldn’t control his arousal to her stunning body, making it just delightful to this.

"Ehm... yes... yes," Mark was just trembling, unable to speak properly as Dina’s hand stroking his cock through the fabric of his pants, sending jolts of pleasure, and his spasms, his hips bucked, as at every stroke of Dina’s dainty hands.

"I feel... hot... and sooo different in this body, Mark..." Dina said, she was just delighted, and also moved by the urges of her new youth and female body, "the only thing my head thinks, is just cock... and cum... oh yes," she said in a breathy tone, almost like she couldn’t control herself as well, feeling like prey of the urges of her young and sexy body, "I need cock so badly," she said and then knelt and with a faster pace, she unzipped Mark’s pants and revealed his hard cock, making her eyes glow was a result.

"Oh fuck... it’s so big... and veiny..." Dina’s mouth watered, feeling completely at the mercy of this big hard cock, and the only thing in her mind to be pounded by his seed.

"I cannot control myself, I need cock," Dina said and then, licked his cock, with a skillful way that seemed as her thought she was always born that way. "Oh god, so yummy," she said and then massaged his cock with her plump lips, sending electric shivers through Mark’s spine, as he moaned and shuddered in response of Dina’s skillful movements massaging his shaft with a maestro.

"Oh god... this... this so... so fucking hot," he moaned, feeling lucky to see the former Dr. as now sexy young girl working his shaft with reckless abandon, the serum had changed not only her body but also her mind as well, as she urged some joy by her body were all over her lips, making her unable to think anything but a big hard cock impaling her mouth and sprayed with cum.

"I... NEED... COCK," Dina thought as her head bobbed like a maniac around Mark’s cock, feeling hard and throbbing, Mark felt his cock and her head worked and feeling her take every bit of his cum in her throat, and then her pussy watered, aching hard with anticipation to his cum filling her, making both moan and just trembling in anticipation as both reached the points of no return.

And then... it happened.

"OHHHHHHHHHH," a grunt escaped from Mark’s lips as he erupted in spurts of cum inside Dina’s little mouth, making his entire body shake, his eyes rolled back into sockets in response.

"MMMMMM," the noises from Dina’s mouth audible as she sucked every bit of cum, making drops of cum spilled from her mouth and fell on the floor, as the taste of Mark’s cum was so intense for her that made her just cumming in response, as her body trembled, as she tried to swallow every bit but was hard as the cock spurted over everything.

"Oh GOD," he moaned loudly as his cum was just leaking too and, as Mark’s cum, Dina tried his best to swallow every bit but overwhelmed by the puddle of cum on the floor was result.

Both came in such an intense way that overwhelmed their intense serum effect.

"Oh my god... that... was... amazing," Mark whispered as he was slowly returning to his senses, watching Dina licked his cum and from his cock, and then licked her lips, grinning and biting her lips as she had her dose of cum her sex-crazed body needed.

"Oh god... this is so fucking hot," Dina whispered back, and then between her anticipation she had that rush of being horny since her old days as Dr. Calius, now with that serum she finally had fulfilled that fantasy as she licked the cum from the cock of her once student and colleague now, her voice...

"Don’t forget to clean the floor, Dina," Mark said, as Dina saw the puddle of cum on floor, and biting her lips watching her and said, "Oh yeah, so much cum, baby," and then she bent on the floor and licked the load of cum with her naughty tongue, and moaned, and her pussy leaking over and over again, feeling used, and horny, like a cum dumpster, a life she always wanted.

"This is so fucking perfect," Mark whispered as he was just growing hard again as he watched Dina licking the puddle of cum off from the floor, and he wondered, and shocked at this new look to see the once conservative middle-aged doctor now in that slutty horny girl, a life she had run into wildly, and mind-blowing way, making him just really horny and want to fuck her right now... and using like his personal cum dumpster, and filling her up over and over again.