Jeff nervously queued up the Chronivac. He entered in his information, and that of Danny. Soon he would be able to feel what it was like to live in his friend's body. He was incredibly excited.
Standing in the mirror by his desk, he took his shirt, jeans, and socks off. He surveyed his tall, fit, handsome 16-year-old body. His long legs, his flat stomach and slightly defined arms. Of course, nature had been very kind to him. He was about to throw his blessings away, just for a second, just to see what it was like.
Walking back over to the screen in just his boxers, he hesitated for just one second, and then, like ripping a bandaid off, he quickly pressed "Start".
Jeff felt a rush of blood to his whole body as it began to reshape itself. He felt a strange pressure in his head as his face grew softer and his skull grew wider. The skin on his whole body suddenly felt loose and soft and his muscles felt relaxed, like he was sinking into a comfortable chair.
He felt a bizarre, slightly terrifying pressure in his skeleton—his legs, his arms, his spine were slowly beginning to shrink. His soft skin began to fill up with warm fat, stretching it to its limits. Jeff's belly and his butt got the most intense sensation as Danny's fat filled them up. "There's no going back now," thought the teenager. He could feel his face being stretched bizarrely, his nose and teeth and forehead all moving into strange new positions and shapes. He shuddered a little as his butt continued to fill up to its new size, stretching his boxers tight against his dick.
He was afraid to look in the mirror as the transformation was going on, but after a short while—or had it only been a few seconds?—carefully Jeff decided it was time to walk over to it. Walking felt funny, as though his whole body was being dragged to the ground by his shrinking skeleton and his increasingly heavy midsection. Nervously, he closed his eyes and stood his transforming body in front of the mirror. Taking a deep breath, he opened them.
"Holy fuck."
There was Danny. The boy in the mirror looked left and right but he couldn't see Jeff anywhere. He was alone, in Danny's body, with only Danny's reflection to keep him company. He felt started at the sensation of being in a room he wasn't actually in. If anyone walked into this room, they would have no idea Jeff was in it. Just Danny, the short, half-naked chubby boy. "God," Jeff muttered. This was real.
Jeff had never seen Danny with his shirt off, and now here he was, mostly naked with only tight black boxers straining to contain his penis and his oversized butt and thighs. Jeff nervously took Danny's hand and touched it to his enormous, soft stomach. It was really there. He gently lifted the heavy pale gut as high as he could and let it drop, enjoying the strange, new sensations. He poked a finger into the fleshy mass that was now part of him.
His attention quickly shifted to Danny's boobs. He had never seen a girl's naked boobs before, and this wasn't quite the same, being chubby boy boobs and all, but it still excited him very much. He squeezed his small, flabby breasts together, then rubbed his nipples and tried to picture how much fun it would be to have boobs all the time that you could touch any time you wanted.
Jeff was quickly realizing how comfortable Danny's body was to live in. He thought being chubby and short would be miserable and embarrassing, but actually he felt pretty nice playing with his new stocky body.
He turned to the side and examined how his new butt filled out the tight black boxers. Danny had an odd posture which caused his belly and butt to stick out and look even bigger than they actually were. He took a deep breath and tried to stand up tall, sucking in his gut and rotating his pelvis, to look as tall and skinny as possible. It was totally hopeless, he chuckled. Danny at his tallest was only 5'5" or maybe, if he was lucky, 5'6". His short legs completely screwed him over no matter how good his posture was. Jeff was exhausted after just a few seconds, and Danny's body quickly collapsed to its old, comfortable posture, losing an inch or so of height as his soft, heavy belly took its rightful place in front of him.
Jeff took a look at Danny's small feet, and felt the pressure of his heavy body pushing down on them. He would have to check out the bathroom scale and see how many pounds he had gained. All in good time, he thought.
He was fascinated by the big, soft butt he now wore. It felt really nice to rub it. He decided to take a look, turning to the side in the mirror. He pulled down the back of his boxers and took his first look at his friend's fat, pale butt. He was totally invading Danny's privacy and he loved it.
By this time Jeff could not ignore the pressure on the front side of his boxers. He had never been the least bit attracted to Danny, or really to boys in general, but there was no denying how hot this was. He had a whole new body he could do anything with, and it was so much more comfortable than his old one. He could feel the warm, pulsing pressure filling up Danny's cock and making it thicker and harder. He wanted to tease himself a little more before looking at it, so he kept the underwear on for now.
He got closer to the mirror and looked at Danny's face. He wasn't ugly by any means, but he certainly had the bulbous look of a short, chubby kid. His face was wide and his head was bigger. It wasn't long and angular, like the face Jeff was used to wearing. Danny's eyes were set far apart and had a slightly squinty look to them. His nose was totally different, round and wide without much of a bridge. His lips were puffy, and actually quite nice looking, he began to realize. Jeff ran a finger down Danny's forehead, over his wide, soft nose and his thick lips, and without knowing what he was doing, stuck Danny's finger in his mouth. He didn't know why, but this made him more excited than ever. He began licking his finger and watching his strange reflection obey his commands. He really had total control over this nice-looking body. His cock was raging, almost painfully, feeling rock-hard and slightly wet in his boxer shorts as they tightly cupped his fat rear end. He took his finger out of his mouth and decided to try out Danny's face. He smiled at his reflection, then scowled, then stuck his tongue out. It was amazing what he could do as Danny. For no reason except the thrill, he leaned forward and kissed his reflection, pressing his thick, soft lips against the glass. His new dick brushed up against his reflection and he couldn't take the excitement anymore.
In one quick motion he grabbed his boxers and dropped them to the ground. Danny's rock-hard dick greeted him, pointing straight up toward his overhanging stomach. It was much thicker than his old penis and at least an inch shorter. No, two inches shorter. Danny was packing a short, thick penis which felt so much harder and stronger than Jeff's. He gently touched his new penis, rubbing the soft skin. He pulled his foreskin back and felt the amazing sensation of the skin sliding over the wet head. He rubbed his scrotum and ran a couple of fingers through his pubic hair. "Wow, Danny's cock is awesome," Jeff thought.
He looked up at the reflection of the short, chubby, slightly handsome boy rubbing his penis under his fat, heavy gut. There was absolutely no trace of Jeff in that reflection. He was totally Danny in every way. He played with his flabby stomach and breasts as he jerked off his short, thick dick. This was the best thing Jeff had ever felt. After a minute or two he turned around again and rubbed Danny's huge, soft ass.
He could live in this body forever. He could break the Chronivac and be trapped as a 5'5" fat dude for the rest of his life. The thought was terrifying and so exciting he felt his balls getting ready to explode. He aimed his new cock at the mirror, sliding his foreskin back and forth, and felt a weakness in his short legs as his fat body began to lose control.
Suddenly his stubby penis lurched, hard, and a huge load of hot cum shot out of it and streamed over the mirror. He allowed his massive body to collapse faintly against the mirror as he continued to stroke his amazing new toy in ecstacy.
After a few moments, he stood up and immediately felt a little embarrassed. He totally violated Danny just now. Why did it have to feel so great? He gave his reflection another long, slow kiss with his beautiful new lips and then walked his naked body across the room and collapsed into his bed. He loved the sight of his pale, soft tummy rising above him as he lay there. He curled up and massaged his naked body, rubbing his breasts, his butt, his thighs, his feet. The belly, of course, was his favorite part. It was so... insistent. Danny had to carry this thing around, all day, every day. He had to wake up with it every morning. What an awesome thought, thought Jeff, as his new body began to doze off...