Chen spoke up first. "We'll go to the park. It's open air and the grass will be comfy if we all end up naked. Plus there's always a ton of visitors." The others all nodded and voiced their agreement. Inside their bodies, a change was already brewing, but they had plenty of time to get to their destination before it exploded out of them. The fastest way was by using the moving sidewalks, so they hopped on and were taken for a ride.
Eden looked very much like its namesake. The shiny chrome, circuits and blinking lights stopped dead at the border, giving way to a lush green field with exotic alien plants and trees and passive alien animals. There was no fence of any kind surrounding the place, yet somehow, the plants and animals never once escaped their 500 acre perfectly square enclosure. As for city dwellers, they could come and go as they please and there were plenty of them in the vicinity tonight. Families having picnics, couples, a few aliens taking the name literally and going fully nude, and of course the rangers keeping everyone safe. In a place like this, Dan fit in perfectly.
The four boys casually walked through the field, not attracting much attention from the parkgoers. After a few minutes, just when they thought not much would happen, Chen doubled over and his headband fell off, replaced by a pair of real antennae. "Woo! I think it's starting!" As his skin began changing color to pale green and sweating a thick, sticky slime, his shirt was already tearing due to what looks like a snail shell growing from his back. He yelped as his eyes bugged out in different directions, growing out of his head attached to long stalks.
Terry took a step back. "No way! Cool! Erk--" he felt his stomach growl, and his already fat stomach ballooned outward, bursting through his X-large shirt with ease. He felt not only hungry, but painfully horny, as his erection grew and grew until it began to rip his silver pants apart. As his growing bulk tore his clothes to shreds, neon blue fur was visible growing on his arms, legs, and thighs. Terry rubbed his eyes as his face transformed -- his mouth grew wider and wider, growing sharp, salivating fangs, until it overtake his eyes and nose, leaving only a gigantic, drooling mouth!
Bryce looked on with excitement. He was already unzipping his jumpsuit in preparation, and when he bared his chest he saw a light coat of orangish fur growing over him as well as two nubs growing from his torso. The nubs grew longer and started taking shape of another pair of legs! Bryce's back arched and bent backwards, forcing him down on his still-growing limbs, leaving him in an awkwardly tilted position. His hair grew stiffer as orange fur covered his face, giving him a bird-feather-wave look, just without the beak.
"These are getting tight..." Chen felt his own erection stretch his pants, which burst open to unleash a long, prehensile tentacle cock. He sat back, tore off his shoes, socks and what remained of his pants, and vigorously rubbed and massaged it with his lizard-like hands and feet. Terry also bulked up until his clothes exploded off of him, exposing a three-inch thick girthy dick. Chen took one look at his friend's new appendage and went for it, fitting as much as he can into his mouth, while Terry grabbed all the shredded clothing around and devoured it hungrily.
At this point, a lot of aliens, families and other visitors were starting to stare in awe, some disgusted but others very interested, and a few bold aliens joined them in pleasuring themselves to the sight. Bryce, who now had four centauroid legs ending in large humanoid feet, tore off his shirt and the torn remains of his shoes and pants and rolled over to admire his own stiff boner rising from under his four-legged half. Dan could barely contain the own lust in his twin cocks. The only question is which one of these bizarre specimens he wanted to engage with.