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Tristan sat out on the porch of his family's winter condo, the mountain air crisp and clear which is just what he needed for his sprinting training. He'd be happier with a few babes on the slopes or on the beaches of Hawaii but if he wanted to have an chance next year he needed some serious training, he'd been skating by just on natural talent but his coaches knew that was going to end. His body ached from the training earlier in the day, his folks allowing him a beer before heading out to town for supplies and probably drinks of their own. His relaxing came to an abrupt end when a whistling filled the air, a streak of fire slamming down not far off from the cabin causing the entire building to shudder. Tristan leaped to his feet though regretted it when they groaned and ached though he couldn't help it. The thrill of seeing a falling "star" was already running through his veins and he sprinted out over the porch towards the site of the crash, over fallen trees and still smoldering bush. The snow around the are had melted leaving the ground still steaming and the scent of it filled the air around the fairly large crater.

He slide down the side of the massive hole before pulling his shirt up over his mouth in case there were fumes or anything dangerous in the air which only proved to expose his well toned and honed body. The epicenter of the crater oddly had no debris, a smooth and round object resting in a puddle of boiling water. The scene almost seemed out of a sci-fi movie, the sphere obviously made of metal with no seeming seams or scratches and the evening sun glinted off it's surface revealing it's almost oil colored surface. Tristan scrambled back up to the forest above, grabbing a downed branch before scrambling back to the small pool. He gave the object a poke, the surface offering a clink before rolling out onto the earth with a hiss as it hit the rapidly cooling ground. What he didn't know however was when he hit the orb it slowly started to crack in hairline fractures, it's contents slowly rousing as black goop leaked out of the cracks.

Tristan moved to test the heat of the object before lifting it up despite it still being quite warm to the touch, disregarding any kind of further safety when dealing with objects falling from the sky. The black liquid continued to leak out of the cracks causing them to grow before the entire thing shattered in Tristan's hands as he almost made it onto the porch causing him to cuss out loud. The metal cut into his hands, the torrent of black liquid flowing out all over his shirt and legs though it seemed to almost refuse to roll off him. Finally understanding that maybe messing with a space rock and it's contents may be dangerous he tried to dash inside and push his hands under the sink to try and wash the black goop out of his open cuts that seemed to not have started to bleed though no matter what he tried the water rolled and beaded off the liquid as if it were some kind of rubber. "What the hell?" Tristan muttered, tugging at the substance which caused it to pull and grow taut before snapping back into place. All the while more of the substance started to crawl and stretch along his tight body, a tendril swiftly running up his neck before plunging itself into the shocked boy's ear with a cry.

Tristan tried to desperately claw at his ear, panic overtaking him as he started to cry out as he could now feel more of the rubbery substance crawl over his body though any struggles ceased as it almost feel like a white hot poker had been driven into his mind causing his eyes to roll back into his head. Then the lights went out, the alien substance sliding fully along the boy's head as it swiftly enveloped his body. Alien images flashed through Tristan's head of exploding stars and more pods like the one that had crashed in the forest near his cabin. Weird beings in black body suits shoving the alien substance into them before going slack and awaiting their death, massive structures stealing the energy from countless stars. The alien inside him was a seed, sent to Earth to start the process of draining the sun of it's potent energy, a symbiont created to turn the solar system's native species into the workforce for the project. But none of that mattered as the symbiont overtook Tristan's minds, picking and removing what it didn't need while reinforcing what it did. Tristan could tell the creature as pleased with it's new body, strong and health with access to plenty of it's food source. Virile and fit men.

It was so pleased that it wanted to give Tristan a reward, after all it wouldn't do if the mind of it's host wasn't shown just how good it was to obey, Tristan's hands drifting to his swiftly engorging dick before pulling it free from his shorts. By now his entire body was covered in a seamless black suit, his cock sliding out as it pulled taut against his body to show his well defined muscles. His hands worked slowly over his cock, feeling the symbiont slowly delver into his meat and balls, slowly transforming him as he fell to his ass as he was overcome with lust. He'd jacked off before but now it was different, the symbiont pulled and tugged against his human flesh underneath as it assimilated him fully. Each tug pulled his length longer, causing it to swell and grow more sensitive. His balls swelled as well, the symbiont converting his body to create more of itself. The process alone was wildly pleasurable, causing Tristan to moan though it was muffled behind the film of symbiont over his face. However not being able to see or hear anything only seemed to make the pleasure all that more fulfilling, feeding him onward as his cock grew from it's meager six inches to nine then to a foot. The tip flared, thick ridges and bumps growing along it's full length as still clear pre-seed started to flow.

He could still tell what his hands were stroking along, desperately trying to open his eyes before the symbiont allowed it, two white slits opening to give the newly created beast a view of the world around him and the first view for the symbiont as well. He took in the sights and smells, letting the entity process it before he resumed stroking along his cock as his eyes gazed on it with shock and awe. He'd seen porn but he never though he'd ever get to feel what it was like to have a pole that big but here he was. More pleasure flooded his mind as he gave in, moaning more wildly as a seam slowly started to form over his mouth before massive and sharp fangs burst forth as he gave in to the transformation fully. The symbiont continued to feed the human vessel with images, beautiful and muscled men bowing down and while before he had no interest in men the brain washing of the alien quickly solved that. But Tristan wanted more, wanted to feel them and now as he slowly bent his body up to wrap a quickly growing and slick tongue along the head of his length hungrily. He teased the bumps and ridges as his body bent to unnatural angles, his cock finally stopping at a foot and a half of virile meat, his lips closing over it to help bring him to climax.

He stroked his cock with his tongue and lips, the pleasure more intense than anything he'd ever felt as his body trembled in need but it didn't last long. Thick ropes of still white cum flooded his mouth though the torrent didn't end as his balls churned and pulled up against his body. White ropes of sploodge swiftly tuned to a torrent of black goop, immature symbionts but easily replaced as he gulped his own seed down. Once spent the new creature that had been Tristan stood, the smybiot yielding the body to his host as the black second skin slowly transformed back to Tristan's former track outfit and just in time as the door opened and slammed shut.

Tristan's brother Paul skipped into the room, panting a little after his own run, a year younger and much more effeminate, paused when he saw his brother before perking a brow. "Whatcha doing brow?" he laughed, moving over to pour himself a glass of water. Tristan watched his brother closely, the smybiot yearning for the twink though the human mind tried to restrain it. "I-I uh...did you see the meteor? I went out and brought it upstairs...just cut myself is all." he mutters, glancing upstairs. "Y-You wanna see it?" he asked dully, moving up behind his brother even as he tried to fight it. Paul only nodded eagerly with a smile, glancing over his shoulder when his brother loomed over him with another laugh. "Ya but you're just...being so weird! Did you bump your head or something?" he asked innocently enough, slipping up the stairs slowly for his brother to keep up.

Tristan's mind was losing the fight, feeling the transformation back to himself slipping no matter how hard he struggled. He closed the door to their room before discreetly locking the door, watching his brother cast about the room for the rock. "Where's it?" Paul finally questioned before turning to look at his brother as he doubled over as the symbiont finally won the struggle as it took over it's host body and got to work to remove any kind of struggle it might show in converting others to hosts. "G-Got something hard for you right here." he hissed as the front of his pants rippled and pulled out into a massive black phallus, all Paul could do was gawk and puzzle at the almost surreal scene as his brother transformed into a massive black fleshed monster with a mouthful of sharp white teeth. The symbiont didn't give Paul time to collect himself, pouncing on the twink in the blink of an eye as it shred his clothing to reveal his slender frame. "W-What the fuck Tristan?! What's happened to you!" his brother wailed though the symbiont only chuckled. "Call me Slade." it hissed, keeping the boy up against the wall as his arms bristled into thick tentacles that caressed and groped at Paul's body despite the human's struggles. "I know you like to watch me in the shower." Slade hissed, pulling out memories from Tristan effortlessly as the thick appendages moved the twink's legs about and up to expose his ass. "Going to give you what you want you fucking slut."

Slade thrust Paul down along his cock, the bumps and ridges dragging and stimulating him as he was filled well beyond what he thought he could hold as he continued to scream in pain and fear. A thick tongue swiftly delved into his mouth, sharp teeth dangerously close to his face as the slimy length thrust into his mouth and throat. Paul's throat bulged as it was invaded, more tendrils wrapping around his shamefully growing length as the beast that was his brother started to thrust that delicious yet monstrous cock into his burning hole. He couldn't deny having peeked on his brother even if his was wasn't full of tongue, his own trying to slide against the appendage as he slowly gave into the pleasure as that thick cock started to drive into his deeper and sensitive places. Paul felt a tendril drive into his cock as more wound up to his face to hold it stead as one finally wound it's way into his ear. Soon he was bucking and squirming wildly in the monster's grip, being converted even before a symbiont of his own could adhere to him. The effects pleased and intrigued Slade, never before had it encountered a species that so eagerly gave itself to pleasure and gratification. It would perhaps have to appeal to saving some of the Humans for play things. But none of that mattered as it felt it's balls pulling up against it's body before tensing, drenching the insides of the human with more of it's spunk before letting his body to fall to the ground. It was quick to clean up any evidence and unlock the door as it gave control back to Tristan, thoughts of school filling it's mind as it rested. Tristan glanced down at his slowly growing and writing brother, content that they were now true brothers once more.