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"Is it ready?"

"It better be."

Dragone held the test tube in front of him. He squinted his eyes and looked carefully at the substance inside. At first, it didn't react. The black ooze remained inert, even when the dragon shook the tube vigorously. But as soon as the eaker approached the tube, small tendrils came out from the substance, covering the remaining space in the tube.

Danny was besides him holding the speaker. The red dragon, eager and curious, pointed at it from different directions to observe its reaction. "It's particularly sensitive to it", he pointed out.

"Yes, but only in that form."

Dragone wasn't so sure about having Danny as his assistant, as it could represent the end of his career if someone figured out what they were doing.

Due to several incidents, the council forbid any type of experiment with the specimen labeled as DR 001 until further notice. Dragone didn't agree on that decision, nor did his son, Welshdrag, who managed to snatch a sample of the specimen so they could conduct their own personal research on it. However, one small mistake led the council to discover the missing sample, and Welshdrag took the blame so his father could continue the investigation, since he had far more experience. Of course, experience alone wasn't enough, and Dragone still needed a trustworthy assistant.

"According to Welshdrag's notes, it varies from host to host. It also works only on this frequency."

"Different species, different frequencies. It's safe to assume it adapts to the host's capabilities. It's understandable why the Council disapproves it, and yet..."

"It's a very narrow point of view," Danny said. "There is so much potential in this specimen. Imagine all the things we could do with it," his eyes were full of hope.

"And we will. But in the meanwhile, I don't see why we shouldn't indulge in some... personal use," Dragone put the tube back in the rack and moved away from the table.

The green dragon started to take off the laboratory attire, staring with the lab coat. It wasn't until he took off the shirt that he noticed Danny had his eyes over him; unlike him, the red dragon had no clothes besides the lab coat, so his half-erect cock was visibly coming out of his slit--as expected, he did nothing to hide it.

"It's for... research purposes," Danny explained with a wide smile in his face.

Dragone only shook his head and giggled. He didn't mind it, though. After all, science wasn't exactly their main interest when it came to that strange symbiont. However, he tried to maintain certain professionalism and undressed in a semi ceremonial way, folding his clothes instead of throwing them to the floor.

Despite his age, Dragone could very well be taken as a male at the end of his twenties. Not as muscular as Danny or Welshdrag, but the slender figure and his heigth captivated males and females alike. His body divided into two scales of green, with the chest and the lower part of his tail being a lighter one compared to the scales; a black-jagged pattern followed the outline of his chest. Dragone took special care of his horns, both sharp and shiny, as he considered it was his most attractive element.

Once he got rid of all his clothes, he unfolded and stretched his wings. The lab coat only had an opening for the point where the wings bended, and it sort of help to keep both folded against his back. It was harder to maintain that position as he grew older.

"If what the report said it's true, the symbiont should change your physical appearance," Danny started to walk around Dragone, taking pictures from different angles. When the green dragon frowned, all Danny could do was shrug and say: "Ah... research purposes? It's important to keep a record of the changes you might experience."

"You know you don't need to use that excuse, right?" Dragone clarified.

Danny was very straightforward and open-minded when it came to sex. That was the main reason why they allowed him at the end to be part of their project.

"The feral specimens used in the previous tests failed to show the symbiont's full adaptability," Dragone continued. "In each scenario, it rejected the host--although it did it without hurting them in the process. The symbiont it's clearly conscious, and we might assume it understand the concept of life."

"To think something like that could exist...," Danny put the camera on a tripod and pressed the record button. "Ok, the date is February 28, 2022. We continue the test on the capabilities of the subject DR 001. Doctor, a word?"

Despite his nakedness, Dragone turned to face the camera and talked with the same solemnity of always--he was a male of science, regardless of the sexual nature of his experiments.

"Yes. As we have established in previous recordings, DR 001 can be described as a parasitic entity. As soon as the symbiont invades the host, it starts to change his physical appearance, staring by covering the body with a substance visually similar to latex. We named this variant DR 001-A. After this, the symbiont seems capable to change at will the host's body shape. This isn't just a visual or esthetic change, and our theory suggests the symbiont merges with the host to a cellular level. However, once the symbiont left the body, there is no evidence that could prove it. It is possible that the symbiont rejects the host due to their small sizes. Because of it, we decided to try a different approach. Over the past few weeks, me and my assistant developed a serum based on a sample of DR 001-A," Dragone made a pause to take a different test tube from the rack. "We named it DR 001-B. After using it on feral test subjects, we can confirm it retain a portion of the original symbiont. While it cannot change it's physical appearance, it's a safe option to verify the kind of reaction it might have on a larger and anthropomorphic subject."

Dragone looked at the tube with mixed feelings. On one side, he was scared of going on with that experiment, since the project was originally canceled after conducting similar tests; while he wasn't using a direct sample of the symbiont, that was no warranty an incident could occur. On the other side, his heart raced at the idea of being covered by that slimy substance...

From the moment he saw what the symbiont did with its hosts, Dragone couldn't contain his excitement. The way that black substance covered the body and tighten around it. How visible was each part before the symbiont started to change it. Oh, what a pain was to keep his erection hidden from the rest of the team. Not one of his latex suits could bring him any joy after what he witnessed in the laboratory.

When he looked back at Danny, the dragon was already getting into the safety suit designed for those tests. Everyone at the lab joked calling it the "condom suit", since it looked and felt like one. At first, it did looked like an used one, especially with all the lubricant used to prevent rashes or wounds, but as soon as one clicked the button on the left wrist, the entire suit closet to fit perfectly to the user's body, leaving just the head out, for which they used a special helmet. The use of underwear was normally required in the lab, a norm Danny had no reason to follow there, and his cock was already poking against the latex wall.

Dragone stopped for a moment to admire the red dragon's muscular body. Vacuum-sealed, the suit only remarked the shape and firmness of his body. The lubricant made his chest shine under the white laboratory lights, making it even more attractive to the view. Danny was visually unaware of how fucking hot he looked on latex. Dragone would be lying if he said he wasn't dying to rub against his body at that precise moment.

Danny took a moment to unfold and stretch his wings, and also to waggle his tail to adjust the suit. Keeping the wings folded under that pressure was not ideal, so R&D made a different model for winged species, which took more than anticipated.

"Ok doc, all ready," Danny announced.

"G-good," he cleared his throat. Fuck, as if it wasn't hard enough to keep his cock under control. "We'll be conducting our first test of DR 001-B and record the way it affects a bigger host."

He made a pause. This was the moment he was waiting for. Dragone put his fears aside and drank the solution in one go. The taste was awful, and the sensation left as it went down his throat was even worse. It was like drinking frozen car engine oil.

"Tasty," Danny joked. All Dragone could do was smirk at the sour taste.

"It's... we should work on making a better flavor," he replied after some seconds. "God, it's disgusting. But it's the most efficient way so far. The..." he cleared his throat, "the previous tests showed results after five to ten minutes. If it depends on the host's size, it might take longer for this test." Dragone rubbed his throat. He could still felt it in it. It was like a lump. "We'll be recording the kind of effects it has on me. My assistant will be providing support and..." another pause to clear his throat, "... ah, support, yes, in case of side effects. DR 001 and the variants A and B have shown a dislike towards certain sound frequencies. In fact, both variants loses control over their mass and abandon the host after some seconds, once again, without hurting it in the process."

"Doc..." an astonished Danny pointed at his face.

At first, Dragone couldn't understand what was happening. Then he felt it, right after noticing he couldn't utter another word. Coming out of his maw, a black goo started to cover the sides of his face. Its advance was slow, like a slime dripping. And even when the substance was coming right from his throat, he wasn't gagging or coughing. The only thing he felt was the lump pulsing to match his heartbeat. The goo covered the scales on his face, and moved up his horns, perfectly matching their shape and even the sharp of the tips. As soon as it finished, it went down the neck to cover the rest of his body...

Danny couldn't give credit to what he was watching. So far, the others subjects were covered rather quickly. But with Dragone, the process went slower. From a scientific point of view, it could be due to the host's size, as the symbiont had to adapt to a different bone and muscular structure. However, the way the slime descended was almost... sensual. It was the first thing that crossed his mind. It went down his chest, and along his arms up to the tip of his claws. He took the camera from the tripod to record how it covered the upper part of his wings, and how it started to drip all over the wings' membrane. Danny already perceived something had went wrong, and yet, he was captivated by the merging process.

Oh the other side, Dragone was still unable to speak a word. It was an assault to his senses. The slime was cold, but it immediately heated up in a way that reminded him of a latex suit. The parts of his body that got already covered by it felt the same tightness, but rather than the vacuum-sealed sensation offered by the suit, that one felt more like a strong hug or someone pressing his hand against him. It was a pleasant feeling. No... it was exciting. Both his heartbeat and breathing increased as the slime reached his hips. And when it finally found his sheat and invaded his slit, Dragone couldn't resist the urge to moan. He fell to his knees, victim of an indescriptible pleasure as his cock was covered by the cold slime. It was like a climax going on and on and on...

Danny made sure to record every second of it. Unaware of it, his erection grew against the condom suit, and the thick cock was visibly trying to get free, pressing against the thin layer of transparent latex while throbbing hard and dripping pre like a faucet. It resulted in a delicious-looking bulge, one that Dragone noticed once the dragon stood on front of him.

And then, the slime reached the tip of his toes, and the sealed suit was created. It was as if something made click at the very right moment when his body got completely covered, a click that brought Dragone to his orgasm. A plentiful load came from the dragon's cock, still inside the sheat. He felt it bursting out of it, only to find the thick layer of slime. With nowhere else to go, the hot seed went down his balls and thighs, acting like lubricant for the tight suit.

He was out of breath. He couldn't do or say anything for a couple of minutes. All he could do was enjoy the sensation the suit provoked all across his body. Years of using latex felt meaningless compared to that moment. The pleasure was beyond his imagination. The first thing he did once his body responded was move one hand down his crotch to feel it; it was so hot from the slime and the cum. He wasn't sure if it was right to keep calling it slime, as the texture was something close to latex. While he was sure there was nothing there, he couldn't get out of his head the idea that his sheat resembled the shape of a chastity belt, even when he could feel his cock already out of his slit. But that idea got pushed away as he continued exploring his body--even the rubbing sound was similar to the one made after rubbing a latex suit. He stretched his arms and wings, finding their movement completely natural and free, despite how tight the seal felt across his body.

Danny wanted to find an explanation, but that was out of his comprehetion. The process alone defied logic itself. They knew the symbiont would open several doors to a better future, but seeing those opportunities finally coming to life was hard to believe. He started to look around Dragone's body; everything was covered in that black ooze.

"Are you ok?" He asked, giving a worrisome look, despite having his cock throbbing against the condom suit.

"Y-yeah... I think so". Dragone said. It was still his voice. And he was still him. The dragon took a deep breath and inspected himself once more. Both the scientist and the pervert within him were happy and excited over the results. "It is a tight fit, but it's not painful. From the inside it feels just like a latex suit," he started to breath heavily. "It's... it's starting to get hot in here."

"We should take a sample to test his resistance."

"Yes, do it," Dragone agreed, trying to think as a scientist for a moment. "Besides our personal interests, there are multiple uses we could give to a living suit like this one. It might revolutionize society."

Danny nodded as he took some instruments from the table. However, as soon as he set out to take a portion of the ooze, Dragone moved away from the instruments.

"Stay still."

"I-I didn't do anything," Dragone explained, but once again, he jumped away from Danny when the dragon tried to take the sample. "W-what's going on? I sweat I didn't move!" He said with panic in his voice.

Right after that, a tendril came out from his back, then another followed from his hip. His arms got swollen and his paws too. His wings opened and the membrane grew in size. And so, his entire body started to mutate right in front of Danny, who had dropped the tools and stared in horror at the grotesque aspect Dragone was taking.

"D-Danny, help!"

Dragone's voice made him react. The red dragon ran to turn on the speakers located around the room. It was a simple emergency protocol they implemented, never expecting to use it in the first place. Luckily, it worked. The entire suit shrieked in pain and started to lose its grip around Dragone's body, leaving portions of him uncovered. Danny took the opportunity to jump in and help the green dragon to get out of the suit.

"Hurry!" Danny screamed, pulling him as hard as he could.

And it started to work. Despite the resistance offered by the symbiont, Danny managed to get part of Dragone's body out of the suit. Unfortunately, they underestimated the creature. After some seconds struggling, long tendrils were shoot at high speed towards the speakers, destroying them and thus, putting an end to the frequency played. The symbiont immediately regained control and covered Dragone again, pushing Danny away.

"It's weak!" A deep voice screamed. Despite not being his voice, it came from Dragone's mouth, covered in that dark ooze. "This host it's useless!"

Host?! Could it be that the symbiont had that level of sentientness, even if the solution used just a portion of it? It even discovered and targeted what they were using to weaken it. Against that, there was nothing Danny could do to stop whatever was happening to Dragone.

"D-Danny...! Do something...!" The dragon screamed. His voice sound weaker, muffled by the ooze invading his throat. He extended his arm towards his assistant, and clenched his fist when he felt something invading his anus. A small tentacle that quickly grew in size inside of him, stretching his hole while invading his bowels, deeper and deeper.

Danny couldn't think of anything to save him. The symbiont had no other known weakness. And even if it had, there was no warranty it wouldn't hurt Dragone. In a fit of desperation, the red dragon ran towards him and took him between his arms. He didn't know why or how would that help. It was the only thing that crossed his mind.

The symbiont continued changing in his embrace. But something did happen. Pressed against each other, both bulges started to rub as the symbiont struggled to take over Dragone's body. Danny felt his size, the way it pulsed under the thick layer of latex, how hot it was. And the constant rubbing and squeezing started to appease the beast, who noticed too the size of Danny's cock under the condom suit. He saw the symbiont going back to his previous state, covering the entirety of Dragone's body. But something was different. Rather than taking the shape of the green dragon, the symbiont's muscles became bigger and stronger, a thing Danny quickly discovered when Dragone hold him between his arms.

"This... yes...," he heard the deep voice said.

Danny wanted to escape for a moment, but Dragone, if it was still him, kept him close to him, rubbing both bulges more and more. And as he did it, the red dragon's lust took over. He always admired and desired Dragone's body. A good looking dragon, with a slender figure and a perfect size in everything that matters. His scent always lingered wherever he went. And that voice... boy, how much he wished to hear his moans. Having him that close to him, and feeling the massive bulge he had, it was a dream come true for the horny dragon.

"This feeling... I like it..." the deep voice said. When Danny looked at his face, he saw two deep black eyes staring back at him. There was something ominous on that look, something truly dangerous. But his reason was fogged by the lust, and the only thing that Danny could do was kiss that dark figure as he continued rubbing his crotch.

His shape changed. Even with his eyes closed, he felt the muscles growing, pulsing. The symbiont reacted to his lust. To think that such a simple instinct could stop that creature. No, it was more than a simple reaction. It didn't stop him like the sound did. Despite being just a fraction of it, the symbiont was changing as Danny stimulated him. The scientist within Danny wanted to take note and investigate those changes, but his lust-driven mind wanted nothing else but to enjoy the touch and presence of that creature.

Danny continued the sloppy kiss. Even when the symbiont held his head, even when the long tongue invaded his throat, all he wanted was to continue kissing him. The sloppy sounds were at the same level of the latex being rubbed down there. Both cocks were fully erected, with only Danny's being visible. His red shaft gleamed with the vast amount of pre that had came out already, and not even the tight seal of the condom suit could keep his cock in place at that point. The throbbing meat moved from one side to the other, pushed by the even bigger bulge Dragone had--while hidden under the dark latex, its shape was perfectly visible to the point that even the veins were in detail. More than a suit, one could say that the symbiont was glued to his skin.

Danny trembled. The rubbing alone was pushing him to his climax. He didn't want to finish yet, but he refused to stop feeling that hot bulge against his cock. He tried to stop the kiss to no avail. He wanted to look at Dragone--as if it was right to still call him by that name. There was so much he still wanted to do with him in that form. But even the tongue in his throat prevented him from moving away from his maw. He squirmed and whined, just as his cock bursted inside the suit, shooting a huge load that covered his belly and immediately started to roll down his hips and legs. Only Dragone stopped him from falling, as the intensity of his orgasm drained all his energy.

"How...?" Danny thought. Not a single orgasm in his life had felt like that one. He had no words to describe it. Not a single theory. All he knew was that he wanted to repeat it.

Dragone pulled out his tongue, and Danny fell to his knees as soon as he broke the kiss. The red dragon drooled a black goo from both sides of his maw. He didn't react to it, already absorbed by the size of the bulge in front of him. It was so huge and musky. The scent of sweat and precum went through the dark suit and mixed with the smell of latex, making a fragrance that brought his libido back immediately. Danny pressed his nose against the huge bulge and sniffed hard and deep. He rubbed his face all over the bulge, covering himself with that strong musk. And as he did, his erection came back as firm as ever.

He felt the huge claw over his head, leaving no option for Danny but to continue rubbing his nose. It was so smooth. Yes, it looked and felt like latex, but at the same time it felt alive. It squirmed in response to the hot stimulation. It wasn't just Dragone's cock, but the entire suit did it too, at a different pace than the red dragon inside of it.

"Good... this feels good... I love it!"

From one moment to the other, Danny found himself on the ground with Dragone over him. It happened so quickly that the red dragon couldn't react when he got his face covered by the musky bulge. He barely had space to breath, but that became the least of his worries when he felt the huge maw pressed against his own crotch. From the hot breath to the lips closing around his cock, the overload of sensations broke through the dragon's defenses. He squirmed under Dragone's body, only to start licking and nibbling the fat bulge. Rather than the sour taste of latex, his tongue identified the flavor as something salty, something similar to sweat. And the suit texture against his tongue was not so different from real skin. All of this just made Danny eat the bulge with more energy and desire.

And Dragone responded with the same desire. On top of Danny, he tasted the bulge to his heart content. He followed the outline of his cock drawn under the transparent condom suit. That red shaft twitched with every lick, as if the latex barrier didn't exist. He even hold it in place so he could lick the bulge better, giving special attention to the tip of his cock. And the more he licked, the more Danny twitched under him. Without a warming, the red dragon came a second time. A load as big as the previous one, but a climax stronger and longer. Dragone saw with delight how his cock bathed in his own cum. Some sections of the condom suit bloated with the dragon seed, fighting against the sealed suit. And before the young assistant could recover, Dragone returned to his task, nuzzling and licking and nibbling at the bulge, while his hands made sure to spread the cum all over his body.

Danny was far away from the point of no return. The sensations, the smell, the taste, everything became too much for his mind to handle. The more he licked, the more he craved for that suit. When Dragone got tired of the 69, he put the red dragon on his fours and started to rub his bulge between his ass cheeks. It felt so real. Even with the sound made by the latex being rubbed, Danny could feel the thick cock against his body. The size, the girth, the burning skin begging to impale his hole and claim it. And Dragone continued humping. Harder. Faster. In his lust-driven mood, the red dragon tried to grasp to anything, but not even his claws could pierce through the suit. And before he could come with an idea, Dragone switched positions again...

It was one change after another, with Dragone in complete control of the situation. He made Danny ride his bulge, then sat again in his face, he switched to missionary, and went back to do a 69. And Danny couldn't do anything but follow his commands. In his brief moments of lucidity, he theorized over the aphrodisiac qualities the symbiont could have, and how the proper stimulation and host could potentially increase that feature. But then his lust regained control and the only thing he wanted was to keep rubbing and squeezing both bulges together. And he found himself constantly looking at Dragone's eyes, craving that same look for himself. The shiny latex covering his entire body, hiding any trace of his real appearance, so he could be a deep dark silhouette of a dragon.

There was no way to tell how much time had passed. It could have been mere minutes or even hours. The only thing that Danny had clear was the view of his own body, covered in that dark sticky goo pouring from Dragone's body. The condom suit managed to keep it out of his body, but nothing protected him from all the ooze he drank from the sloppy kisses he gave him. He could feel the symbiont already inside. Lurking in his body. Messing with his brain. And he liked it. He wanted to be like Dragone.

The dark dragon huffed as he felt his own climax finally getting close. He was conscious of the damage done to Danny's mind. The red dragon was no longer capable to look beyond the lust. Standing, he embraced Danny just like he did at the very beginning, and gave him one final kiss. With a deep growl, his entire body tensed up as he shot a massive load that quickly bloated the dark suit. The tentacle still invading his hole squeezed his prostate to get to the last drip of cum out of those balls. And as his hot seed started to spread all over the insides of the suit, the symbiont turned it into a new layer of latex. It solidified and tightened across Dragone's body, while the original symbiont invaded Danny's body through his mouth.

The red dragon had no choice but to swallow it all. In his own maddening orgasm, Danny felt the symbiont going down his throat as his cock continued shooting his load against the thin layer of latex. He whined during the kiss, looking right at Dragone's eyes, and he felt grateful for sharing a moment like that with him.

When their climax finally ended, Dragone took a step backward. The dark latex glimmered under the laboratory's light, a completely new and renewed appearance. Unlike before, his facial features were more visible; it did resembled the scientist's image, even under the symbiont. He chuckled, delighted with Danny's appearance. Inside his bloated suit, the trembling dragon was a massive mess of cum and sweat. While most of it had already accumulated at his paws, there were visible stains and trails of fluids. But what really pleased Dragone was the zonked expression in his face. He went through the ride of a lifetime.

"You will be an excellent proxy for me," Dragone said.

As he spoke those words, dark ooze started to come out of Danny's maw. Too exhausted to fight or even care, he only stood still as the symbiont merged with his scales, managing to slip through the suit's seal around his neck. The process was quicker than before, either due to his exhaustion or the cum covering his body, but before he could notice it, Danny was entirely covered by the alien substance. The condom suit finally succumbed to the pressure and exploded, shooting the contained fluid all around him. To remind Danny of his place, not only the symbiont shove a tentacle deep down his ass, but it created a gag inside his maw with the shape of Dragone's cock, one that constantly secreted hot cum for him to drink. And finally, his bulge took the shape of a chastity belt, one that would prevent his cock for ever leaving his slit again.

Dragone looked at him. And only then he realized that he was back in control. He took a look at himself, all covered in the new and shinier suit. The feeling was completely different from before. And his mind was blooming with dozens of new ideas, changes he could do to the formula to make the symbiont more stable. And when he looked at Danny, hidden under a perfect image of Dragone, a twisted smile appeared in his face.

"We'll be needing more test subjects," the dragon said, unaware of the voice that whispered those words from the dark corners of his corrupted mind.