Ben let out a loud grunt of surprise and pleasure, drawing Rusty's attention. “Ohh mu-muhhh-huhhh..muh ffffeeet feel so..sooo good...!” His eyes were wide and his face held an expression of rapturous ecstasy. Rusty glanced down to see Ben's feet stretching and the thong of the his flip flops snapping away as his heels thickened and dark brown fur began to slowly spring along the top of his feet. Rusty's cock throbbed as he watched the metamorphosis starting, not because he really had ever been into feet, per se, but more in anticipation of it happening to him.
He felt fit to burst as he huffed and hyperventilated. He was overheating, and another glance at Ben confirmed his companion was as well. Sweat was rolling down their faces, matting their hair slightly, when Rusty suddenly felt his knuckles begin to pop, and just as Ben had said, his hands felt SO FUCKING GOOD. He looked down at his sweat-sheened skin, and watched in eager fascination as his fingers thickened and warped. His palms slowly began to stretch longer and grow a thick calloused pad. His nails darkened and grew slowly longer, and chestnut fur started to slowly sprout on the back of his hand, each strand bringing with it an almost orgasmic sensation. “YESSS!” Rusty exclaimed, now fully aware of why his dream-self had been willing to prevent the portal from being closed.
His mouth hung open as he looked over at Ben and showed him his hand, and they shared a long gaze at each other, smiling as they bared growing canines at each other. He wasn't sure if his own transformation was arousing him, or if Ben's was, but he didn't care any longer. All he wanted was this. All he wanted was to change and make others change! His jogging pants billowed out as his cock began to thicken, and he sank to his knees as the pleasure drove him down. His swollen and sensitive tip brushed his thigh, and he felt a hot glob of precum rub on his leg as he let out another cry of pure pleasure.
Ben let out a primal roar of release as he tore open his shirt, shredding it with growing claws. “YES! YES! CHANGE!” Rusty's cock throbbed again as he saw the dark brown fur across Ben's chest as his pecs rippled. He smiled over at Rusty, baring a mouth full of fangs. “Morrrree...morrre...MORRRRRRRE!” He yelled, with a voice that had begun to deepen, then crashed down onto all fours as his hands lengthened into forepaws.
Rusty felt a tightness in his shoes, and felt the fabric give way as his feet exploded outward with a satisfying sound of fabric rupturing and bones stretching, and he reveled in the way he could feel his talons digging into the hardwood floor of the room. He could feel the seams of his shirt straining, and with an almost effortless shrug of his shoulders, the shirt ripped, falling away and bathing eve more skin in the strange energy that poured from the portal, this miraculous energy that made him change.
His cock felt thicker and longer. It was tenting the front of his jogging shorts out so profoundly that the waistband wasn't even touching the skin by his navel. It bobbed and brushed against his thigh even more, notably hot as it wiped more precum on his leg.
Ben's shorts gave way with a ripping sound, the tearing of the khaki fabric that was unable to withstand the metamorphosis of the other man was like music to both of their ears. He either had gone commando (like Rusty), or his underwear had given way at the same time, and Ben let out another wordless moan as his whole body trembled. He rocked back and forth on all fours, urging his transformation further, bathing in the energy. His shoulders broadened, and now a thick coating of fur was growing along his spine and shoulders. He let out a series of loud groans as his spine thickened and popped, seeming to hump the air, as a sheath enveloped his cock and his balls tucked up. His eyes popped wide open, and he stared at Rusty. “Ohh fuuuckkkrr...m-m-m-mhhh..prrrrostate shifffftinnnnggggg!” He let out a series of loud half-growling moans of a higher pitch, arching his head high. A red rocket popped out of the sheath. “Wolf! Wolf! Wooooooolf!” he yelled, punctuating each with a thrust of his hips. With every thrust, his voice got deeper and rougher. With every thrust came more snaps of bones expanding and a rustle of more fur growing, and pops of muscle swelling. Finally, his wolfish prick erupted, splattering seed in a long distance, high volume shot across the floor of the room.
Rusty's thighs were swelling, his legs were swelling, and his loose-fitting jogging pants were uncomfortable now. It was harder and harder to think as the pleasurable sensations flooded every cell in his body. He tore at his joggers, easily shredding the thin nylon and exposing his definitely larger and definitely thicker cock and balls to the energy and light from the portal and let out a shriek of immediate ecstasy as it immediately was wrapped in the most pure, undiluted pleasure he'd ever experienced. He rocked backward and flopped onto his back as the sensations travelled down the trunk of his cock, past his balls and then...deeper.
The pure electric lightning of his prostate beginning to warp sent Rusty completely rigid. He let out a loud groan of pure satisfaction as his body's transformation moved suddenly faster. A sheath swallowed his cock, save for his bright red tip which ballooned in response to the increased stimulation. His long toes and claws curled and scratched at the floor, dragging scars into the wood. His torso cracked and popped, widening and building muscle, filling him with strength.
Deep inside him, his most sensitive spot was pulsing, vibrating, and stretching, reforming along with the rest of his anatomy and obliterating any thoughts beyond his transformation into the beast. He was becoming bigger, stronger, BETTER than he had before. All he wanted was to change, to cum, and to obey his master so that more people would change, and cum, and obey his master. It was so simple.
He thrust his hips up, thrashing as his body reformed into its new, perfect form as his face began to stretch forward and his skull thickened. He let out a howl as his muzzle snapped into place and he shot ribbons of semen into the air, splattering down onto his fur and the floor around him.
Slowly he and his packmate stood, their postures slightly hunched and their bodies rippling with muscle, covered in fur – his a deep chestnut reddish brown, Ben's a darker flat brown. They positioned themselves on either side of the portal, still basking in the energy that poured through, waiting on their master's emergence, and ready to stop anyone who might interfere.