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 planned to become the same age as his father, which was 47. Jeff typed in this as his new age. He changed his role in the family to "father of Mike", and the option for Mike changed automatically to "son of Jeff". 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 dad's shoes, he would also need some of his dad's knowledge and wisdom, so he ticked the mental change option.
Satisfied, Jeff moved on to his dad's transformation. "Alright dad, should I set your age to be 16?"
Mike thought about it, before replying, "Actually, I think it'd be better for me to be 21. I don't wanna miss out on my beer."
Jeff agreed and set his father's new age to 21, which would make his dad 26 years younger than him after the change. For the remaining options, Jeff chose the same ones as before. 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.
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 3 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 slower, but nonetheless evident as he began to look more energetic and youthful. The hair on his head was now mostly brown, and many of his wrinkles were already gone. His muscular definition started to return to his body, and his previously rather large belly was already quite small now, and still shrinking. Mike followed Jeff's example and took off his clothes as well, seeing how his hairy dad bod was slowly 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 regressed through his thirties, 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 seemingly 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 almost 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. 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 the halfway point of the change, they resembled each other closely. Mike noticed this as he regressed past 35, chuckling as he saw Jeff in his early thirties 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 30. 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 a middle-aged man in his mid-thirties. He was already past 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 some gray and 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, his 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. Jeff continued to age, watching as some of the hair at his temples began to turn gray and the wrinkles became deeper.
As Mike grew 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, but he decided that it would be better to give it a test run when he had some private time later. However, he saw that the bodybuilding progress he had made also started to undo itself. Slowly, Mike lost some muscle mass, since he was regressing back to 21, which was when he was still a serious gym-goer but not focused on bodybuilding yet. Mike could only watch as the gains he had spent hours in the gym for disappeared, gradually turning him back into a decently-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 slightly more youthful, although it was still masculine. Mike glanced over at the Chronivac, and saw that there was less than a minute left. 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 was now already in his early forties, and had a few more years to go before he reached 47. By now, his hair was obviously graying, and the wrinkles on his face were quite evident. Jeff saw his body become more flabby as the former muscular definition was lost. He began to put on weight particularly around his hairy stomach, which grew outwards slowly, giving him a belly like he knew Mike had had before the change. His chest sagged as fat accumulated there, forming the beginning of man boobs. His beard grew out into a full beard, and as Jeff looked at himself in the mirror, he couldn't deny that he now looked quite old. Jeff's changes eventually began to slow as he reached 47, and that was when he knew that the ten minutes were almost over.
In the last few moments of the change, reality began to shift to match the changes. The room turned from Jeff's room into Mike'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 47 year old dad and Mike as the 21 year old son.
"Damn, Jeff, this is amazing," Mike blurted out. "Sorry, I mean, dad, this is amazing."
Jeff laughed. "It's okay Mike, 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. What do you suggest we do now?"