Robert and Victoria's second day goes quite smoothly - both of them awaken early, spend a little time examining themselves in the mirror, and get dressed in their most revealing clothing - which is to say, quite conservative by most standards.
At school, they breeze through quite easily, allowing them to ponder their upcoming gym sessions. Unlike the first day, they find themselves anticipating their time with Cassie and Steve. During their lunch breaks, while most of the other students hang out or otherwise occupy themselves, our nerds find themselves out on the sporting field. The first few minutes involves them discussing their workouts from the previous day, but they quickly decide to push each other a little.
Of course, they're nerds, so they find a way to make things interesting. They do jumping jacks and sprints, with each set of jumping jacks being sequential prime numbers, interspersed with sprints of with lengths growing like the Fibonacci sequence (1, 2, 3, 5, 8, 13,...). It's only when they get to 37 jumping jacks that they find themselves exhausted, and they jog to class, arriving just in time.
After school, they walk together to the gym. They arrive just as their trainers do, and without a word, Robert and Victoria go their separate ways with their trainers.
Cassie takes Robert through another full-body workout - this time, however, they would add in some serious leg work, Cassie informs Robert, as it was the one part she didn't focus much on yesterday.
Cassie prepares him for squats by first having him use a leg press machine. Each set, his legs seem to warm up physically, until after the third set, it almost feels like each touch is scalding his hands. It is like his legs were pure energy, radiating heat like an arc welder.
It is the squats, though, that really do the work. After guiding Robert through the correct form (each time she manipulates his waist, his glutes seem to swell slightly), Cassie starts to load a bit of weight onto the bars, bringing the total to 40 kg. Robert glances at the guy on the next squat rack, where the weight was easily three times as much, and he feels just a little deflated.
Cassie sees this, and whispers into his ear, "you're already so strong, and you'll be even stronger so soon. Look at yourself in the mirror, you're strong, you're manly, you've got this!" With every word, Robert's chest puffs out a little in pride and his cock hardens in his workout shorts, creating a little bulge. As she finishes, she guides him to start his first set.
Down and up, down and up, Robert initially struggles to raise out of the squat position, but with each rep, he finds it easier and easier. Even as he pushes out rep after rep, he finds his eyes fixated on his quads, which seem to be bulging with muscle. He even swears to himself that he can see some definition in the muscle, a hint of that "teardrop" shape he had read about.
After 30 reps, Cassie stops him, exclaiming that she must have chosen too light a weight for him, followed by a giggle that Robert is starting to think might be an affectation - he realises that she seems to flip between airheaded bimbo and serious expert seamlessly.
After a couple of minutes of "rest", Cassie loads another 40 kg onto the bar, and Robert doesn't hesitate before starting his second set. After another 30 reps, Robert notices that his legs already look about twice the size they had before, and there is definitely some shape to the muscle. He starts posing his legs in the mirror, marvelling at the changes, as Cassie coos in his ear about how great he is looking. He feels like his dick is going to punch a hole through his clothes, it is so hard.
Loading another 60 kg onto the bar, Cassie tells him that this is going to challenge him. Glancing at the guy on the next squat rack again, he notices that they're now using the same weight. His neighbour manages 5 reps before needing some help from a buddy to re-rack the weight. Robert resolves to beat the buff guy.
As Cassie had promised, the weight isn't easy for Robert. He grunts as he lifts it off the rack, a rather high-pitched sound compared with the grunts from those around him. Dropping slowly into the squat position, Robert feels truly challenged, and has a moment of doubt. Cassie immediately starts to cheer him on, and with a rush of strength, he pushes himself back up, grunting a little deeper than before.
The second rep feels paradoxically easier and harder and he watches as some small veins pop out of his quads as he pushes up again, another, even deeper grunt emanating from his mouth. The third and fourth reps come in quick succession, and then he struggles through the fifth rep, matching the neighbour's performance. Cassie starts to congratulate him, but he feels resolved to get through one more rep, to beat his neighbour. A look of appreciation flashes across Cassie's face as Robert drops into his sixth rep.
He starts to push up, and watches as his legs seem to swell with every second. the muscles not just getting a little definition, but becoming a muscle relief map, the teardrop clearly visible. His entire lower body was burning, but he kept pushing. As he slowly edges up, he feels his glutes and core tighten, his entire body pushing through the rep, a deep and resonant growl driven from his diaphragm.
Cassie breaks out in applause as Robert re-racks the weight, her chest jiggling from the motion. Robert notices, and his tool becomes harder than ever. His crotch feels unusually restricted.
Cassie praises him once more, and suggests that they take a short break before getting to the rest of the workout. Robert, in a naturally deeper voice than he had ever been able to manage, suggests that she take him through some basic posing. This take Cassie back anew, as her clients don't normally know about these things at this point, but she acquiesces, and they move into a separate room designed for posing and form-work, with many mirrors at various angles. To Robert's slight initial relief, the room is empty except for the two of them.
Cassie takes him through each of the seven compulsory poses. After a few moments of awkwardness for each of them, Robert catches on quickly and gets each pose right. And each time he does so, he's rewarded by a slight improvement in his muscle definition and a jolt of sexual energy pushing his cock to almost inhuman levels of hardness.
As they come to the end of the posing sequence, Cassie notices Robert's... predicament, and offers to help. A little shy about the situation, Robert starts to refuse, only to relent as he stares at Cassie's generous mammaries. Turning to lock the door, Cassie has Robert drop his pants and underwear (he had already shucked his singlet for the posing) and reaches for his hard, hot erection.
The touch of Cassie's hand on his tool drives him to pleasure beyond his wildest dreams, and he feels a pressure build up behind his member. The pressure seems to push outwards, and his 10 cm manhood begins to swell once more, seeming to get harder even as it grows, his balls growing heavier below it. His attention shifts back and forth from Cassie to his own reflection (posing each time). Within a couple of minutes, Robert's moans of arousal turn into grunts as his now 14 cm dick begins pumping out man juice, managing a healthy 5 spurts against the nearest mirror and another 2 drooling onto Cassie's hand, Robert's body quivering the entire time.
Robert experiences a moment of arousal again as Cassie begins to lick up the cum, first from her hands, and then from the mirror. If he hadn't just released, he'd be hard right now.
After getting dressed, the two head back out and move to the nearest available bench. Robert, still incredibly motivated, doesn't hesitate as Cassie loads the bar to a solid 60 kg. After 5 quick sets of increasing weight, they move on to deadlifts, then alternating preacher curls and weighted dips. After each exercise, Robert admires the improvements in the mirror.
Finally, they move on to pull ups - an exercise they had avoided yesterday as Robert was not strong enough to get started. This time, Robert feels like it's too easy, and Cassie adds extra weight using a weight belt. As Robert performs rep after rep, his entire body seems to stretch out under the weight. By his 50th rep, he slows down, and has to push through the pain. He finishes at 59 reps with 20 kg of extra weight.
When he drops to the ground, he is momentarily off-balance, his perspective higher than before. He had been 170 cm - now, if he had to guess, he would say he is closer to 190 cm. Where before he looked Cassie in the eye, he now sees clean over her head. It takes a moment for his mind to catch up to his body, everything feeling strangely twisted, but he quickly settles into his new stature.
Just at that moment, Victoria and Steve walk out of the women's training area, and Robert does a double-take. Victoria is significantly more slender, her breasts perkier, and her posture dramatically improved. Her hair, no longer the bedraggled mess it had been before, was longer and straight, hanging perfectly over her shoulders. She smiles and her teeth seem to have aligned just right - there's still a hint of buck to the front teeth, but it's endearing rather than awkward.
As they approach each other, Steve approaches Robert as Cassie gives Victoria a warm hug. Steve reaches up to ruffle Robert's hair, and it grows out further, now tousled nicely to suit his new, slightly buff body. Robert can't resist pulling a pose for Steve, and Steve punches him lightly in the arm while expressing appreciation. Robert glances in the mirror to see that he's now fit enough to look athletic. Not yet a true bodybuilder, but more like the combination of a cyclist, a basketballer, and a junior wrestler. His chest pokes out from his body, creating a little overhang, and his lats sit out slightly even at rest. His abs are now a solid six pack, and his legs rival the younger bodybuilders in the gym (still far from Steve's superior quads, though).
As Robert and Victoria leave the gym, they can't help but explore their own, and each others', bodies a little. Without a word said about it, they both head for Robert's home to do homework together.