Nightly Invader
It was late at night, and Michael was sleeping fitfully in bed. Over the past few nights, he'd been plagued by dreams; strange dreams involving the dark silhouettes of creatures hovering over him, humming strange songs that seemed to penetrate through to his soul. They seemed to leave him sapped of energy in the mornings, getting so bad yesterday that he had to call off work.
This night was no different, leaving him tossing and turning atop his mattress, blanket and pillows long ago cast to the floor. A gentle breeze caressed his naked body, making him shiver with sensation. Up from the edge of the bed, suddenly, a green-glowing glob of ooze appeared, seeming to peek over to see that Mike was solidly asleep. Assured, it slithered across the bedsheets, none of its viscous body left to waste as it moved. Squeezing between Mike's thighs, it pressed up under his ballsac, seeping up around it to twine around his night-time erection.
Mike inhaled quickly, jostled awake by an unknown tickling from his nethers. Blinking quickly, he could only half-see a strange bioluminescent figure hugging his shaft. With nubby, makeshift limbs, the thing spread his tip wide open, and before Mike could react, the thing slammed its "head" in, making him throw his head back and scream in pleasure. Panting and confused, he turned his gaze back down as another wave of pleasure washed over him. He watched as the ball of ooze squeezed itself down him, his shaft seeming to drink the thing in large gulps. With each gulp, his urethra stretched beyond what was possible, and yet instead of the expected pain, all that he could feel was a paralyzingly-intense pleasure.
The last few drops of the slimy creature crawled up his shaft and down into it, leaving him moaning and panting, wondering what had just happened as he regained control of his body. He blinked tears of pleasure out of his eyes, staring at his now normal-looking cock. He sat up in bed and tentatively grabbed it, and that's when he noticed that his ballsac was swollen to an enormous size, each nut easily the size of a softball, but the strangest thing was that a soft green light seemed to emanate from within them. Hand shaking, he cupped one and gave it a gentle squeeze. Pleasure suffused him again as thin green slime suddenly poured out of his cocktip, running down and pooling on his crotch. Despite the nagging fear that he shouldn't be doing it, he reached his other hand out and touched his strange ejaculate, rubbing it around on his skin and reveling in an electric tingle wherever it touched.
He gave his balls another squeeze, harder this time, and a small arc of glowing green cum splashed over his hand and crotch, and as he spread it on his pubic hair melted in it, dissolving away until his crotch was bare and wonderfully smooth. He couldn't stop touching it, rubbing himself in slow circles, working his way up his cock. Moaning as the electric tingle shot through his shaft, he started pumping himself furiously, spurred by instinct for more pleasure. Squeezing his balls and working his shaft, his whole crotch was covered in glowing green in no time. His shaft's surface began to twist and distort, almost melting into a gel consistency, but he didn't care, now too concerned with his own pleasure.
He squeezed his nuts hard, the soft orbs giving readily and squirting across his chest. He only panted harder as the alien cum melted away his hair, worming its way through and spreading into his torso. He squeezed again, practically crushing his pliable nuts and sending a jet of slime splashing into his face and down his mouth, leaving him gurgling through it, passing it down his throat and into his lungs. Instead of choking he gurgled happily one last time as warmth suffused his lungs, spreading up his throat and out his mouth, leaving him leaking glowing slime from every hole on his face.
His hand departed his sac as his balls began to spasm of their own accord, sending cum splattering over his body at random. Covered in the rich slime itself, his now-unoccupied hand traveled down to between his buttcheeks, spreading them and pressing slime-slicked fingers into his asshole. He moaned as the sensations from his hole quickly heightened, pressing more and more of his hand in until his entire fist was shoved inside himself. His fingers danced inside, spreading out as the resistance within was slowly fading. As he delved deeper into his ass, his innards became slimy, seeming to melt, encasing his hand in thick ooze, trapping it inside him.
He moaned, every twitch from within him sending his pleasure to new heights. He jerked himself off still, his hand little more than a ball of ooze wrapped around a jelly-like cock, every inch of him now covered in bioluminescent slime. He shuddered and tensed, his entire body seeming to jiggle as he finally peaked. Jelly-thick cum pushed its way up his mutated shaft, pelting down over his body and sticking thickly on top of him. As wave after wave of the thick ooze covered his body, his pleasure kept rising inside his rapidly fading mind, too intense for him to bear. His body was covered over in a thick jelly cocoon, his mind slowly fading to black...
The cocoon began to pulse, bathed in the light of the moon which poured through the window. It began to glow again from within, something it had not done since it had sealed up days before. A crack began to form, a set of dark green claws prying their way out from inside. The rest of the cocoon split, breaking away from the body within as it rolled to the floor, shivering and flexing its newly formed body. It shivered and stretched its limbs, covered in thick green exoskeleton, slowly rising. It would have hit its head on the ceiling if it weren't naturally crouched over, bent to maintain balance on its long and clawed digitgrade feet.
Stretching, it raised its four arms into the air, large, floppy antennae bobbing from its head as it did. It remembered, remembered what it was, what its purpose was, remembered that it was no longer Michael. It did not have a name, did not need a name. It reached out with its mind, making contact with its others, far away on another planet, and was met with loving mental caresses, making it murr quietly in a deep, grating voice.
It reached down and into its crotch, fishing out a long, tapering phallus with two claws. Curling the prehensile instrument around its digits a few times, it gave a few warming pumps over its smooth surface. Touching its tip with another hand, it thrust a digit down into his shaft and groaned deeply, enjoying its smooth and stretchy instrument. It was ready now to begin constructing its lair, and with a soft slurp it removed its claw, bringing with it thick spurts of slime that spattered against the rooms walls, coating and dissolving them, reforming their surfaces into thick, gelatinous resin. It guided its member with a hand, splattering over the walls and furniture, planning who to make its next victim...