Jeff and his dad Mike thought about what changes they could try with the Chronivac together. It was a rare opportunity for them, as Mike was often busy with work and had little free time to enjoy with his kids. As Jeff pondered about this, an idea came to mind.
"Hey dad, I have an idea. I know it's tough to work and support our family, and you don't have much time to spend with us. Now that we finally have some free time together, I was wondering how we could use the Chronivac to help you relax and enjoy yourself. So I thought we could swap roles for a while."
"What do you mean by that, son?" Mike asked, intrigued.
"It's simple, we just have to swap our ages. I'll become your age and be the dad, and you'll become my age and be the son. This way, you can enjoy being young and carefree again," Jeff said as he searched through the menu on the Chronivac for the age option.
"Are you sure this will work?" Mike was genuinely interested by his son's offer. The stress from work and raising a family had gradually taken its toll on him, leaving Mike weary and longing for some respite. However, he was not sure if the Chronivac could make such a drastic change, even after Jeff's demonstration.
Jeff clicked on the age option in the Chronivac menu and began to type in the details of both their transformations. "I'm sure it will, dad, I don't think there is anything this program can't do."
Jeff started with his own transformation. He had planned to become the same age as his father, which was 47, but thinking on it decided that might be too large of an age jump for him to feel comfortable.
"So if you're going to be my new father, how old should I be?" asked Mike.
"Well, how old do you want to be?" returned Jeff, noticing Mike was interested but unsure of the program.
"Well, I don't want to be too young to enjoy my youth, so anything in diapers or training pants is out. But at the same time, if I'm just shaving off say twenty years or so, that's not much fun either. If I'm going to be young, I might as well test how far it can go."
"So, you'd be all right with say four or five years old?"
"That young?!"
"Well, you said you didn't want to be in training pants or diapers, and most four and five year olds are out of them. And you just said you really wanted to test this."
"Five is good, no younger," declared Mike.
Figuring that out, Jeff typed that in as Mike's new age. He also changed his role in the family to "son of Jeff", and the option for Jeff changed automatically to "father of Mike". Scrolling down the list of options, he decided to tick the awareness option so that he would be able to enjoy the transformation. Jeff realized that people might notice something amiss if they found out that he and his dad had suddenly swapped places, so he ticked the reality change option. To be fully in his son, Mike would also need to forget some of his knowledge and wisdom, so he ticked the mental change option. He explained to his dad that this would make him aware of the change, but everyone else would think that he had always been Jeff's son.
Satisfied, Jeff moved back to his hiss transformation, deciding that since Mike was going to be 5, that Jeff would age himself up to 29 and be a young father, which would make his dad 24 years younger than him after the change. For the remaining options, Jeff chose the same ones as before.
Finally, they arrived at the transformation speed. Jeff asked, "How quickly should the change happen?"
"Hmm, I think it shouldn't be so fast that we don't get to enjoy it, but also not too slow that we don't notice anything... maybe 10 minutes?" Mike pondered.
"That sounds good." Jeff keyed in the change to occur over 10 minutes for both of them. As for how long the transformed state should last, Jeff suggested at least an hour so they had enough time to experience it. Mike chose 5 hours, but they agreed that if they liked it, they could always extend it.
Both of them checked the changes to ensure everything was correct. When they were ready, Jeff clicked the Submit button and was greeted by a warning, informing them of what was going to happen. At the bottom of the warning, there was a single Confirm button.
"Here goes," Jeff said as he hit the button. Immediately, both Jeff and his dad felt a tingling in their bodies. Mike was confused. "Jeff? Is this tingling supposed to happen?"
"It's normal dad, it means the change is starting." Jeff pointed to the countdown timer on the screen, which had already started to time 10 minutes. "I think we should go look in the mirror to watch the changes."
Turning to the mirror, Jeff and Mike didn't see any obvious differences, but that was because the transformation had just started. However, as Jeff looked, he realized that his clothes were getting tighter, and he was definitely growing taller.
"It's happening, dad!" Jeff exclaimed, as he stripped down to his boxers to get a closer look of his changes. As he went through the later half of his puberty, Jeff watched as he continued to grow taller, and his body began to pack on some muscle. A few hairs appeared on his chest and around his nipples, darkening and multiplying as he began to grow a little chest hair. His armpit hair thickened as well, the brown hairs growing longer and more numerous. He felt a tickle in his boxers as his dick lengthened and his balls enlarged, giving him a fuller package. His pubic hair grew into a dense brown bush that began to creep upwards towards his navel. Looking closely at his face, he could see hairs growing on his lip and chin, giving him first some stubble and then some actual facial hair, as his sideburns began to grow in. His jaw and cheeks became more defined, giving him a more mature look. Even the hair on his arms and legs was becoming darker and thicker. Jeff was truly becoming a man, and he liked it.
Mike himself had also noticed some changes - some of the gray hairs had started to turn back to his original brown, and as he watched, his hair gradually turned back to the brown shade it used to be. Some of the wrinkles had also started to fade from his face. Slowly but surely, Mike was reclaiming his youth. As he looked over the rest of his body, he could tell his belly was also beginning to shrink, and he was already looking slightly less flabby than before. He definitely wouldn't be missing his 'dad bod', as his younger colleagues liked to tease him.
As the changes progressed, Jeff had already passed the age of 20 and was essentially done with puberty. Jeff admired himself in the mirror as his muscles became larger and more defined, as if he had been working out in the gym for a few years. The hair on his chest spread further, forming a patch of chest hair that he thought made him look rather masculine. His abdominal hair also began to grow, spreading over the middle of his six-pack. His facial hair had already grown out into a beard, which maintained a trimmed appearance at this point. His muscular arms and legs were also covered by a layer of hair. All in all, Jeff thought he was a rather manly man, and he would definitely have no problems hooking up with girls. The testosterone from his balls flooding his system caused his libido to increase, and Jeff found himself popping a boner, obviously visible through his boxers. He experimentally placed a hand in his boxers, feeling his new and more powerful manhood, shuddering slightly as it sent a wave of pleasure through him. Jeff definitely had to try using this out, and he knew that it wouldn't be too hard to get the opportunity.
Meanwhile, Mike's changes were a little faster and rather evident as he began to look far more energetic and youthful. The hair on his head was now completely brown, and all of his wrinkles were gone. His muscular definition was returning to his body, and his previously rather large belly had deflated and melted away like ice cream on a hot summer's day. Mike followed Jeff's example and took off his clothes as well, seeing how his hairy dad bod was reverting back to a younger version of himself. Mike placed a hand on his chest, feeling as the muscle beneath grew and filled out. As Mike raced through his thirties and into his twenties, his muscles continued to grow, gradually returning him to the bulked out appearance he had worked hard to achieve in his youth, but no longer had the time to maintain after starting a family. Mike's arms and legs grew larger, the fat melting away as it was replaced by muscle. His pecs, still covered by luscious chest hair, were now firm, much unlike the flabby man boobs they had been previously. His belly was gone now, and he could see his abs beginning to show under his generous abdominal hair. His beard slowly began to shrink back, and Mike remembered that this was about the time where he decided to grow out his beard and body hair. Indeed, his watched as his chest hair and abdominal hair quickly began to shorten, and the hair on his arms and legs followed suit, eventually disappearing and giving his body a clean-shaven appearance. Even his beard was gone, leaving his face smooth.
Jeff continued to age through his twenties, all be it more slowly. He now looked pretty mature, and the beard and body hair added to the effect. However, Jeff noticed that his muscular body was now gradually becoming less toned and well-defined. He was confused, but soon realized that this was the age where he would have started a family and Mike was born, giving him the additional responsibility of taking care of his family and leaving him with less time for himself. Jeff sighed as his muscles slowly lost their definition, although it was not so much of a loss as he still looked quite muscular. His body was now coated with a generous amount of body hair, as a large pelt of brown hair covered his chest and abs.
As both men approached thepoint of the change where they resembled each other closely, they looked at each other. Mike noticed this as he regressed past 25, chuckling as he saw Jeff in his early twenties looking just as he did. He put an arm around the newly grown man who was once his son, but now on his way to become his father. "Jeff, this is really amazing, I hope you are enjoying this as much as I do, and that you'll be a great dad."
"Of course I am, Mike, I'm glad that you love this. I'm sure I'll love being your dad as well," Jeff replied, in his new deep voice. The two men looked in the mirror, noting how they were almost the same age and did appear much like each other.
"I guess it's quite clear we're related," Jeff quipped to Mike's laughter. The changes continued, with Mike reaching the age of 20. Mike was now looking at the product of the amateur bodybuilding efforts in his youth. He smiled, gazing over his muscular, chiseled form. All the fat and flab that he previously had was long gone, replaced by rippling cords of muscle. His pecs formed shelves on his chest, and his abs stood out clearly, deep grooves running between them. Mike struck a few poses and flexed his muscles, admiring his body. He recalled fondly about how this gave him an advantage when picking up girls in the bar, and it was how he had met his wife. However, Mike found any further memories of his wife and family difficult to recall. He realized that he was now younger than he was when he had started his family, and the mental changes were kicking in.
By now, Jeff looked fully like he was beginning to resemble a middle-aged man approaching his thirties. He was in his prime, and he knew he was noticeably less muscular and defined than before. The dense body hair he now had didn't help much with that. He spotted a few white hairs appearing, possibly due to the stress at work and at home, and his face started to gain a few faint wrinkles. It was a part and parcel of growing older, after all, and Jeff knew that even though he eventually had to leave his old lifestyle behind, he was still content as the two most important things in his life, his wife and his son Mike, gave him the support and strength he needed. He smiled as memories of the time he spent together with his family began to fill his head. Although he was quite busy at work, he tried his best to spend as much of his time as he could with his family. He settled in, stopping at 29 years of age.
As Mike continued to grow younger, he felt his libido build up greatly, turning him on and giving him a boner as the testosterone reentered his system. Mike knew that he had put his above-average boner to use rather often in his youth. He saw that the bodybuilding progress he had made also was beginning to undo itself. Mike lost muscle mass, since he was regressing back through high school, which was when he was just starting to be a gym-goer but not focused on bodybuilding yet. Mike could only watch as the gains he had spent hours in the gym for disappeared, turning him back into a leanly-muscled guy, but definitely not near bodybuilder status. Nevertheless, this was only a minor loss in comparison to the opportunity to relive his youth. He looked in the mirror and saw his face become rather more youthful as his jawline seemed to begin to round out and his shoulders seemed to become less narrow. He felt somewhat odd as he noticed the mirror seemed to grow slightly as he lost a few inches in height. He looked almost like Jeff had at the beginning of this Mike was looking forward to spending the next few hours with his new dad Jeff, excited to enjoy the freedom that youth brought him.
Jeff had finished his physical changes and was beginning to undergo the mental ones as memories of work, meeting his wife, and being a father began to flood his mind.
Mike was beginning to reverse puberty at this point as what little muscles he'd hung onto faded away, leaving him lanky, and he began to have "shrink spurts" which brought him lower and younger each time. Soon his lanky frame began to push in on itself as the last bits of puberty were removed, his hair all grew back in, he felt odd in his groin as his balls journeyed back up tight against his body and his penis shrank, removing all the horniness that had accompanied his youth up to now. He now looked to be a skinny boy of twelve, who was most certainly shorter than Jeff, but the changes were not done yet as another shrink spurt hit him and he lost what felt to be another foot, causing him to nearly lose his balance before Jeff steadied him. It was then that Mike realized just how small he was becoming as he shrank below his dad's waist. Looking down, Mike noticed that his boxers were now too big for him and had long since fallen down to the floor to his shrinking little feet, leaving him completely naked. His body was beginning to regain a little chubbiness of baby fat across his tummy, legs, and arms. Mike laughed, feeling rather silly being without any clothes. Mommy won't like that.
Jeff meanwhile began to notice as Mikey finally slowed to a stop in his regression in the middle of the single digits of life. While he knew that before, Mikey had been his father, now Jeff could only look at him and see his son. His boy.
In the last few moments of the change, reality began to shift to match the changes. The room turned from Jeff's room into Mikey's room, and the master bedroom now belonged to Jeff and his wife. The pictures in the house changed to show Jeff as the father and Mike as his son, and memories were altered to switch Jeff and Mike around. Finally, the timer chimed, and the changes completed themselves, leaving Jeff as the 29 year old dad and Mike as the 5 year old son.
"This is amazing, daddy!" Mikey blurted out, and then blushed.
Jeff laughed and tussled his son's hair affectionately, saying, "It's okay Mikey, I'm also getting used to this body and you being my son. It still feels pretty unreal. But I'm sure we'll be able to enjoy our time together like this. Now, let's get you dressed and think of something to do, hmm?"