The experiment is a failure, much to both Yasuke and Cube's disappointment...

"Wait! I should tell you something!" Yuta gasped out. Cube halted for a moment, awkwardly keeping her body positioned over him as he sat there on the couch. The feel of her silky, lightly tanned lower legs pressing against the outer sides of Yuta's own legs made getting out each word feel like a herculean effort. He suddenly tried to think of something. Maybe, he wondered, he should tell her that he'd had several notable failures of responsibility recently? Nevermind the fact that he had spent two weeks plowing his chemistry teacher after classes every day and never thought to ask about precautions, but even when he'd been ever-so-slightly less naive after that slip up, both of the jaw-droppingly buxom women he'd enticed into sex with equal parts goofy charm and wads of cash had parted company with him feeling rather irate about the loads up cum he'd left inside them.

But saying that much... he didn't want to admit to it to a girl he liked, much less under the stern, unforgiving gaze of that neurologist. That would give him fodder for quite a tongue-lashing. And so Yuta, his weak-willed and irresponsible id taking over, decided that admitting to such embarrassment and scandal felt worse than letting this fit, sexy, spunky young woman expose herself to the same dangers. "I... uh... I forgot."

Cube found that very funny and laughed, waggling her butt back in forth in front of his eyes teasingly while Dr. Masuda just rolled his eyes again and groaned in annoyance. "Well," the neurologist said, "if this day is going to be a complete fucking disaster at least I can get something out of the 'fucking' part. Go ahead, Miss Cube.... give the dumbass what his lizard brain wants and send him home emptyhanded." he leaned over and adjusted the camera to make sure it was tightly focused around Yuta's straining upright rod.

"Ahhhhhhh~!" Yuta cried out in simple ecstasy as he felt Cube lower her pussy onto his aching cock once again. She went very slow this time, agonizingly slow, making him feel every inch gradually creep over his glans and tickle his shaft with wetness on the way down. He squeezed her stomach tightly in his grip but didn't rush her.

"Ohhh, you're so big. This is sooo slutty, I don't even remember your name but I know I want to ride that big cock aaaaaall the way." she said, still speaking in her loud, exaggerated voice and staring at the camera as she waggled her hips from side to side.

Without warning Cube suddenly **** her butt down, slapping against Yuta's hips with a soft 'pop' and driving his shaft almost all the way. Rising up and dropping her hips onto him again with a soft cry, the second time, Cube dispensed with the 'almost' part - her shaved pink nether lips engulfed him all the way down to the base and shivers ran through her back as the sensitive upper reaches of her labia mashed down against the tense nuggets of the Asahina boy's family jewels. Cube leaned far forward and rested her hands on his knees to grind herself against the wrinkled surface for further stimulation, soft womanly yelps escaping her pursed black lips each time.

"Please, you stupid dick-with-a-tiny-brained-jock-attached, there's only 10 minutes until the end of the timer at least...." Yasuke said with a strained voice. "Could you please AT LEAST refrain from making a mess on the couch in that time, so you can go take care of yourself in the bathroom? Not to mention making sure that the 'video record' isn't too short..."

The sexy short-haired minx riding on Yuta's lap was tossing her head from side to side with each thrust as her partner ('lover' was probably being a bit generous given the unromantic circumstances) bucked up to meet her, filling the air with the sound of ass slapping against hips. "OOOOh yes! Yes, it's going soo deep! I'm gonna cum, I'm gonna cum, I'm gonna... AAAAAAAHHHHhhhhhaaaa~~~hhhAAAAAAAA!" she let out an extremely drawn out, warbling cry as she clenched around his iron-hard manhood while sinking down onto it yet again. squeezing her eyes shut and quivering around him.

Cube shot Yuta a glance over her shoulder. Rather than the passionate, smoldering gaze he might have expected she looked more... mildly amused than anything, giving him a quick nod and a smirk before turning forward again and fondling herself dramatically in front of the camera as she bounced up and down on his lap. Yuta slid his hands up around her chest and grabbed onto her breasts himself.

A split second after he felt that perky, pliant flesh push against the palms of his hands Yuta realized - imagine that - that fondling a bouncing pair of tits while balls deep inside of a girl was his greatest weakness and all of his thoughts of restraint were washed right out of him. His head jerked back so hard, Yasuke asked with soft amusement "...did he just break his own neck?" before Yuta confirmed his continued health with a shamelessly echoing moan, almost feminine in its soft solicitousness.

Cube was sitting down hard on his lap again, raising her hands up behind her back, elbows in the air, and perching her shaved pubic mount right on Yuta's balls, grinding against him. When she felt him start to tense and twitch down there, pushed tight against her labia, she gave a soft yelp and immediately put her weight back on her feet, hopping up off of Yuta's lap in one smooth motion and turning around. "Ohhh! I can feel you about to come too, give it to me!" She bent down and engulfed his turgid member between her lips in one smooth motion, starting to bob up and down along the shaft and suck noisily.

As Yuta slowly came back to consciousness from his little **** he looked up, bleary eyed, and saw the gorgeous punk girl giving him an enthusiastic blowjob. But as much as he wanted it to go on, he'd emptied himself to the last drop, and the will-enhancing **** failed him again as he wasn't able to **** his dick to remain hard. It slowly began to deflate even as Cube escalated her efforts. She pulled off for a moment and looked up at him with vague annoyance. "You can stop holding out already... we went for a long time, I think we're ready to do the 'pop shot' now." she said in a low voice... unaware that a pearly white droplet of cum was already starting to bead up around her pussy lips as she bent down on her hands and knees in front of him.

Yasuke spoke up again after another exasperated sigh. "The sex scene, the experiment, and 600 fucking hours of work in a lab... all of these things are finished, Miss Cube. Don't worry, unlike him you'll be getting your full pay and the bonus we mentioned in your contract... so long as you sign off on the distribution rights, of course..."

"Huh...?" Cube looked up at Yuta, her eyebrows furrowing in consternation. "We haven't finished the cum-shot yet... why are you going limp?"

Yuta smiled sheepishly and flicked his eyes to the side, avoiding her gaze. "Oh, well, I was trying to test to see if the experimental stuff was having any effect I guess... but I couldn't hold out for long enough. I already did the, uh, 'shot' while you were squeezing me so tight with your pussy..."

Cube hiked one of her legs up and bent herself like a contortionist, looking upside down between her legs just in time to see the first white dribbles start to fall onto the carpet from between her smooth cunt lips. "WHAT THE FUCK!?" she shouted, all traces of amusement gone from her voice. "You... you came inside of me? Dude...! This is a AV scene, you- you don't do that in videos!"

Immediately she hopped to her feet and took a wide stance with her legs apart, pulling herself open with both index fingers. No more than the first few droplets had dribbled out. A flash of anger came across her face as she remembered how deep she'd been sitting on that rod when Yuta had let out the, in retrospect, obvious signs of reaching orgasm. The tanned, athletic boy leaned forward and tried to rest his hands on her sides comfortingly but she slapped them away instantly.

"I'm... wait. AV scene? I thought this was just a clinical trial..." Yuta said, mouth hanging slightly open in confusion. Cube let out an extended, wordless groan of frustration and started jumping up and down on her heels. "Oh my god dude, this shady-ass doctor was right, you ARE literally retarded! Fuck, fuck, I've got to get this shit out of me!"

She whirled on the 'Ultimate Neurologist'. "Did you tell him to do that?! I thought this was supposed to be a normal scene where I swallow! Where did you hire this asshole?"

"I," Yasuke said with a superior sniff, flicking a finger over his short collar, "told him to keep his fucking pants on and not to do ANY of that, let alone inject you with a welter of liquid idiot. Just because I'm going to be selling your sex tape on a pay-per-view website to recoup research costs doesn't mean this wasn't an entirely legitimate and earnestly conducted clinical trial."

"Aughhhhhh," Cube groaned, acting as if Yuta weren't even there now and putting a hand over her eyes. "If this is so damn 'clinical' why didn't you tell him to wear a condom or something? I thought I was going to be working with professional actors or something here!"

"Oh," Yasuke said casually, looking over at his papers again, "there was another scene where the male subject was provided a regulation 'climax control' latex prophylactic, but a real scientist has to tinker with every potential variable. I now have reason to believe that the subject restraining himself for longer than the experimental period there was likely due to the sensitivity being decreased by that, not the efficacy of the formula. Although, I suppose this could still be a fluke, and I ought to gather more data... Are you free again next Monday, Miss Cube?"

"Are you kidding me?!" Cube clawed at the air. "There's no way I'm ever working with you again and I'm going to tell all of my friends in the GGs to stay the hell away from your shady operation too! Where's the nearest bathroom? I need to squeeze out all of that 'stuff' before.... auugh!" As soon as he pointed, Cube stomped out and through the doorway, slamming it behind her before settling her butt onto the toilet seat and starting to squeeze her internal muscles as hard as she could.

Belatedly, Yuta's ear tickled. "The GGs? Then she knows... Gum, and Piranha, and...? Oh. Oh, darn. I think I messed things up again."

The ultimate neurologist was getting up and pulling an SD card out of the video camera. "Are you still here? Get the fuck out, nuts for brains. The receptionist will have your bare-minimum 3000Y participation fee waiting for you at the exit."

The only things emptier than Yuta Asahina's wallet as he shuffled home at a far slower pace than his usual athletic nature would allow were his hopes of proving to himself (and Mew, if she'd still give him the time of day) that he was more than a degenerate sex addict... and his balls. "Maybe I should just accept that I'll always be in my sister's shadow and stop chasing after girls altogether... SHE is the ultimate swimmer, I'm never going to be the ultimate anything..." he muttered softly, blissfully unaware that circumstances were proving that not to be the case to the inevitable chagrin of himself, his sister and the spirited female sports enthusiasts he kept bumping into...