Part 2: Combined effect
Two weeks had passed since Mike, Michelle, Rose, Kimiko and Maaya had first started taking the rejuvenation formula. This, Mike knew, meant it was two weeks and two days since he and Michelle first had sex. The memory was burned in his mind -- not least of which because he had also confessed he loved her on that day -- but what he would never have guessed at the time is that with that one small trickle he ended up opening the floodgates.
Simply put, after Michelle had made him wait for nearly three months since they started dating, it now seemed there was no end to her desires. He didn't know if she was normally this randy, or if it was the increased libido that the experimental rejuvenation formula was supposed to cause, or the extra hormones from the breast augmentation formula that she was also taking -- or maybe a combination of all three -- but Mike could barely keep up with her. Not that he was complaining, mind you.
It was early morning after another sex-filled night, and Mike and Michelle were getting ready to go to university. Mike sat on the edge of Michelle's bed while she was in the bathroom, and he carefully examined his cock and balls. He didn't know if it was his imagination, but his penis seemed just a bit larger than before. He thought that perhaps their frequent sexual encounters were the reason that his equipment felt a bit sore and swollen; he couldn't recall that it had ever gotten this much exercise before.
But who had ever heard of someone's dick growing bigger just from having sex? Maybe it was an unintended side-effect of the formula. He made a mental note to ask the doctors this afternoon during the weekly check-up which they were required to undergo as test subjects for Professor Tamura and Madihi Labs.
But if the rejuvenation formula was the cause, it was definitely not something that was supposed to happen. No changes in appearance, that is what Tamura had guaranteed, except for maybe becoming a bit fitter. The formula wouldn't even really rejuvenate them; all it could do in its current experimental state was give them increased strength and stamina, improved senses, a more efficient metabolism, and a few other minor effects. It was very impressive of course, but actually being able to attain eternal youth was still a good way off, according to some of the scientists they had talked to.
So far, none of those effects were really apparent yet. Mike definitely hoped the increased stamina would kick in soon at least; he needed all the help he could get to cope with Michelle's never-ending sex drive.
As he got up and pulled on his briefs, Michelle walked through the bathroom door into the bedroom of her small apartment in the Tokyo Arcology. She had just taken a shower and was brushing her still slightly damp long dark-brown hair. She had a fluffy white towel wrapped around her gorgeous body, which was just short enough to make Mike compulsively glance at its bottom edge in the hopes of getting a glimpse of the promised land that lay beneath; he had to admit that Michelle wasn't the only one with an unusually high sexual appetite as of late.
"Morning, sweetie," she said. "Did you sleep well?"
"Are you kidding?" he laughed. "I've been completely knocked out every night for the past two weeks, thanks to you."
She kissed him on the cheek playfully. "I'll take that as a compliment."
"As it was intended." He put a hand on the side of her face and kissed her tenderly. Then, his fingers traced down her neck, past her collarbone, and continued down to the valley between her breasts.
"I checked my biometric chip data again just now," she said, noticing his interest. "I'm officially a C cup!"
Mike studied the outline of her breasts through the towel. They were marvellously full, and the amount of cleavage displayed above the towel was definitely larger than before. Yet they still felt completely natural, as soft and firm as before, and judging from her reactions during their frequent love-making sessions, hadn't reduced in sensitivity either; rather the opposite. It was already an impressive result, and they weren't done yet, though Michelle still refused to tell him what final size she had selected, preferring to keep him guessing.
Mike thought to himself that he should probably send a thank-you note to Kimiko's aunt. As Kimiko had explained it to him, her rich aunt -- who had some kind of business relation to a company that produced the augmentation formula -- knew of Kimiko's self-image issues and had offered to supply her with the expensive formula not just for herself, but for her friends as well. As a result, all the "Girls of District D" -- the nickname that Kimiko had given to their little group -- were now slowly increasing their bust, much to Mike's delight.
Mike thought that it must be nice to be rich enough that you can decide to do something like that on a whim, like giving expensive gifts to your niece. As it was, he desperately needed the money they were getting for testing the rejuvenation formula to keep up with his rent and other regular costs; neither living in the Tokyo Arcology nor attending the Tokyo Arcology International University was exactly cheap.
As a result of Kimiko's aunt's generosity, Mike was now living out one of his greatest fantasies and fetishes, and he had found that even with the marvel of undressing software being able to nearly perfectly simulate breast expansion, it was not even remotely close to a substitute for the real thing.
He looked lovingly at his girlfriend's improved bust. She had already had a great figure, and the little bit of extra weight on top certainly didn't do any harm. He softly rubbed her breasts through the towel, his fingers tweaking her sensitive nipples through the fabric. By now he had more than enough experience to not have to see them to find them.
Michelle moaned softly in response. "Don't. We don't have time, and they've been feeling a bit weird all morning."
Mike stopped immediately, and frowned. "Weird? How exactly?"
Despite Professor Tamura's assurances that taking rejuvenation formula and augmentation formula at the same time was perfectly safe, it was still a bit of an unknown given the experimental nature of the former. Mike knew enough about how genetic restructuring worked to know that they probably wouldn't interfere, but still, you never knew.
"Just... tingly, I guess," Michelle answered. "Like when your leg has fallen asleep, but a bit subtler and a lot more pleasurable."
"Do you want to call a doctor?" he asked, sounding concerned.
She shrugged, and gently massaged the top of her breasts. "Nah, I can survive until the check-up this afternoon. Besides, it's probably just because you've been abusing them so much," she said, winking.
"I didn't hear you complain last night," he said wryly. "But you're right, we shouldn't assume that... Jesus wept!" he exclaimed as he noticed an unexpected movement beneath the towel.
Michelle withdrew her hands, and looked down at her chest, where Mike was staring. It was only slight, but to Mike's expert eye it was unmistakable. He had played out similar virtual scenarios using his retinal implements often enough to recognize the real thing: her breasts were growing slowly, just barely fast enough to be noticeable.
"Mike, what's..." she began, but her words were interrupted by a moan, and she suddenly felt unsteady. She quickly put a hand against the wall to prevent herself from collapsing.
Whether it was her sudden movement or the growth itself, Mike couldn't tell, but the knot in the towel came loose, and it fluttered down to the floor, revealing her magnificent body in all its naked glory. There didn't seem to be anything strange about her breasts, except for the almost imperceptible growth. Her pretty pink nipples were puffed up, and
very
hard.
Mike just stared slack-jawed at her rising chest, barely able to believe what he was seeing. His briefs became uncomfortably constrictive as his dick became erect as a result of the incredibly erotic sight.
Michelle got goose-bumps over her whole body, and with a final loud moan, collapsed to her knees. Then, it was over; the whole thing had lasted maybe twenty seconds, but it felt like a lifetime to the two of them.
After recovering her senses, Michelle got up from the floor, and sat on the bed. She carefully probed her breasts with her hands, but couldn't find anything wrong. They felt and appeared perfectly fine, except at least a cup size larger than they were a minute before. They hung proud and firm from her chest, noticeably heavier.
"Are you alright? Is that normal?" Mike asked with a note of panic in his voice. Now that the excitement of seeing real breasts grow had passed, concern for his girlfriend had taken its place.
"Yes, and, I don't know," she replied breathlessly. "There doesn't seem to be anything wrong, and the tingly feeling is gone."
"Are you sure?"
"Yes. And, Mike," she turned to look at him, blushing. "It felt good,
really
good. I nearly came." Then her face got even redder. "Imagine that had happened in the transport tube! I would never live it down."
"Well, I have to admit, it looked incredibly hot," Mike replied with a lecherous grin. "But you're
definitely
telling the doctors about this at the check-up today. And we're both skipping the formulas this morning."
------
By the time that Mike was on his way to class, concern had been replaced with excitement again. Other than the strange episode, Michelle did seem to be perfectly fine, and Mike just couldn't get the sight of her expanding breasts out of his mind. He cursed himself for not having recorded the expansion with his implants; such an event was likely to be once in a lifetime.
He had already done some comparisons with the help of his undressing software. Michelle was now pretty much the same size that Rose had been originally, although the tall Brazilian had grown at least as much as Michelle in the past two weeks. Mike once again wondered how big Rose intended to go, and couldn't keep himself from imagining her with breasts as big as Sayoko Tamura's.
Since the only class that the five friends actually all shared together was Professor Tamura's class on genetic restructuring, which was on Tuesdays, Mike didn't meet with Michelle again until lunch. He had agreed to meet up with her and their friends in the cafeteria of the biology department.
Since Mike was a bit early, he decided to check the news, which he hadn't done yet that day. He called up ECNN's feed on his retinal implants, and his view of the real world was overlaid with the image of their busty Irish anchor.
"This is ECNN on-demand, I'm Mary O'Shea, and welcome to the news," she began as always. Mike smiled as he saw that she had left a couple of buttons undone at the top of her blouse; he loved it when she did that.
"Our top story today is the unexpected announcement from China that they intend to genetically alter all new-born girls to be infertile. These girls would need to gain state approval to undo the defect with genetic restructuring in later life, making sure that the country's strict birth policies can no longer be circumvented. In response, the Eurasian Union has threatened to apply sanctions against China and even said they would revoke the country's membership if necessary, as these measures would be against the international restrictions on genetic engineering."
The image changed to show Aaron Ekelund, the current head of the Eurasian Parliament.
"It is simply not acceptable for China, or any member state, to break international law," he said. "We understand that the population problem in China is even bigger than in many other places, but taking away personal freedom simply isn't the answer. This measure would go against human rights guaranteed by EAU laws, which China agreed to adhere to when they joined fifty years ago."
