The Case of Nagisa Fujima and Noboru Mitarai [pt. I]

The afternoon sun cast long shadows through windows that lined one side of the sparsely populated corridor, the other with variously closed and open doors to classrooms.

Nagisa Fujima, a whirlwind of athletic energy with her short pixy-cut brown hair and easy smile, skipped alongside her boyfriend, Noboru Mitarai. Their toned physiques, honed by countless hours on the track and field, spoke of their shared passion for sports and their place within the high school elite. Nagisa, in her short track shorts and oversized jacket, practically bounced with excitement, her smile as bright as a neon sign. Her short, choppy hair framed her face, highlighting her sharp cheekbones and athletic features. Noboru, ever the calm counterpoint, followed with a relaxed stride, his broad shoulders and easy confidence drawing admiring glances from the few students they passed.

Her smile was as bright as the midday sun, reflecting the excitement bubbling within her.

Just a month ago, she had finally gathered the courage to ask Noboru out on their first date, and now soon she was about to experience a big milestone in a young woman's life: Her very first sexual instruction!

Noboru, by contrast, was as passive as his girlfriend was active. Although he enjoyed the excitement Nagisa brought to his life, her energetic demeanor sometimes left him in a state of quiet bewilderment. They'd been just casual friends within their group when she'd confessed her feelings out of the blue. Still, her genuine sincerity and boundless enthusiasm was infectious and before long he couldn't help but reciprocate.

As they made their way through the nearly deserted halls, she took the chance to slip her hand in his, drawing a smile from him. Nagisa looked up at Noboru adoringly, "I'm really looking forward to it. It'll be great!"

Noboru tried to smirk casually, "Yeah... Me too..." He wasn't about to admit to his girlfriend that he was jealous that Tanaka, of all people, would be the one to claim her first. "Though, I gotta admit, I was expecting some, you know, government agent or something. Not Tanaka."

Nagisa's brow furrowed in confusion. "Tanaka? Why? What's wrong with him?"

The tall rangy baseball ace shifted uncomfortably. "Well, it's just... weird, you know? He was that smelly, overweight kid everyone picked on just a few weeks ago. Now he's all of a sudden Mr. Sex Trainer? That's just... I don't know if it's weirder that the government trusts him or that he can actually do it."

Nagisa's enthusiasm didn't flag at all as she looked up at Noboru. "Didn't you hear?" her eyes sparkled with a mix of amusement and curiosity. "They say he's got a real monster down there. That's why they picked him for this."

Noboru, having glimpsed Tanaka's endowment during gym class showers, couldn't deny the truth in her statement. He recalled the snickers and taunts Tanaka had endured from their peers, the cruel jokes about his blubbery physique. But beneath the surface, there lurked an undeniable truth – Tanaka was exceptionally well-equipped.

"Yeah, I saw it," Noboru admitted, a hint of awkwardness in his voice. "The guys used to give him a hard time, but... it's true. Even the other part. Like a grocery sack with two melons in it."

"Oh mai gaa!" Nagisa exclaimed, using Americanized slang as was her wont when excited or shocked. "Really?!"

When he nodded, rather uncomfortable at the direction their conversation was taking, Nagisa shook her head, her brow furrowed in disapproval. "They messed with him for that? That's crazy! Back in the day, guys like him were the ones who supplied the babies for whole villages!"

Noboru raised an eyebrow, surprised by her knowledge. "Really?"

Nagisa nodded enthusiastically. "Yep! My grandma is always going on about how Japan lost its way with the population decline and all. Fertility festivals and all that."

"Fertility festivals?" Noboru blinked as he followed Nagisa down the stairs and towards their destination. "Really? They had those? I mean, I know about Kanamara Festival, but that's just for gaijin tourists."

Nagisa nodded enthusiastically. "Oh sure! A village or town would find a guy with a big dick like that and have him do all of the sexin'. Sometimes it was the Shogun or some big wig who owned most of the land. Then all the girls in town would line up to get knocked up!"

"Whoa..." Noboru's eyes widened as they made their way through the thankfully empty corridor towards the gym storage room that was the location of their appointment. "And that worked?"

"According to my grandma it did," Nagisa continued. "And then my mother explains how 'those were simpler times.' What's that supposed to mean? I'm just glad things are so much easier now with the sex training. Can you believe teenagers in America just have to fumble around? I heard the ones in the countryside don't even know how babies are even made! Or even know about condoms?!"

Noboru shrugged and they lapsed into silence for a few moments before he couldn't resist the urge to ask, "Are you really okay doing it with such an ugly guy?"

Nagisa surprised him with her candidness. "Honestly? I don't think he's ugly at all. In fact, I find bigger guys attractive. They just seem, well, bigger and fatter... down there, you know?" A blush crept up her neck. "I mean, I don't like chubby guys, that's just sloppy. But when a guy is tall and broad, with a big belly and a powerful bottom, it just makes me think they have all that space to house a massive tool, and that's pretty hot, in my opinion."

She seemed to realize what she'd just said to her boyfriend . "Not that I don't like your body, of course!" she exclaimed, her voice laced with panic. "I love athletic guys with... smaller packages too. Er, not that your package is small!" she added hastily. "I'm just saying..."

Noboru couldn't help but chuckle at Nagisa's awkwardness as she struggled to apologize without offending him further. It was just one of the things he loved about her. She was so genuine in every aspect of her personality that it was impossible to take offense to any of her statements, no matter how blunt.

He got it. Big penises caused the most pleasure, that was scientific fact. Common sense. It stung that the average Japanese man was destined to be saddled with an under-endowed specimen, but what could he do? Take solace from the fact that some Japanese men, like Tanaka, were supposed to be super hung as if the Kami had offered some national recompense for the otherwise lacking standard issue?

He patted her shoulder. "Hey, don't worry. I know what you're saying."

Nagisa sighed with relief. "Thank goodness."

"Hah," Noboru chuckled awkwardly. "Just don't forget I'm your boyfriend, okay?"

"Of course!" she affirmed. "You're the one I've been crushing on forever! It's just this training thing... I really want to be a good girlfriend."

Noboru took Nagisa's hand in his as they paused outside of the gym storage room. Excitement bubbled at the prospect of Nagisa becoming a certified pleasure machine and the license that would grant them unrestricted access to carnal bliss, even with his parents under the same roof. Yet, a sliver of unease gnawed at him, witnessing Nagisa willingly surrender to the ministrations of a guy he once considered an overweight outcast. It wasn't jealousy so much as disbelief. How could a guy like that, the butt of every joke for years on end, suddenly be a 'sex prodigy?'

He considered raising these doubts with Nagisa again, but she looked positively radiant as she eagerly tugged him forward, and he quickly changed his mind. Best not to make a fuss over it. He'd sit back and watch as Tanaka performed his magic on his girlfriend's body. And when the time came, he'd simply walk in and take charge himself. Nagisa might've been taught how to please a man, but her heart belonged to him.

Tanaka's wide back was turned towards them as he was leaning down, rummaging through a storage trunk. He quickly turned as he noticed them, grinning from ear to ear.

"You ready to have your world rocked?" he boomed with a dramatic flourish as they approached.

"I sure am!" Nagisa grinned as she bowed politely before her instructor. "Thank you for this opportunity."

Noboru raised his hand in greeting, a weak smile on his face as he studied Tanaka. A big round bowling ball head, thick lips, and an overly wide mouth. He couldn't see what Nagisa found attractive about the guy, but he did have a huge frame. His belly was still a jiggling mass of fat, making his uniform jacket strain around his girth. But his frame was far bigger than Noboru's athletic build, and with the uniform tight across his wide shoulders, the differences in physique between them were apparent.

Noboru found his eyes drifting lower and settled on Tanaka's crotch thanks to his recent conversation with Nagisa.

What he saw was both intimidating and obscene. It looked as if Tanaka had tucked a giant salmon between his legs. The head of his penis clearly outlined beneath the fabric of his pants, pointing down towards his knee and his enormous scrotum was just as prominently on display.

Tanaka might've been as fat as a sumo wrestler, but his penis looked like something you'd find on a bull elephant.

"Woah! Look at this nice lady we got here today," Tanaka chuckled, eyeing Nagisa approvingly. "You're the type of girl that gets me going."

"Th-thanks?" Nagisa blushed, surprised by his compliment. She didn't notice Noboru shifting uncomfortably behind her.

Tanaka whistled lowly, his gaze drinking in the athletic girl before him. "With your tight body and firm ass, you'll be making any man hard and ready to breed."

Noboru felt a pang of annoyance at how blatantly he was flirting with his girlfriend right in front of him. He cleared his throat, shifting uncomfortably. "We're ready whenever you are."

Tanaka paid him no heed and grinned down at Nagisa, who couldn't help but return it. "Of course!" She beamed up at him, her eyes filled with excitement and anticipation. "I can't wait to learn everything there is about sex!"

He clapped his hands together, "Perfect! Go ahead and strip down to your underwear, Nagisa-chan!"
Noboru's jaw dropped as his girlfriend complied without hesitation. "Wait. Here?! Now?!"

"Yeah, yeah. No need for you to worry." Tanaka waved him off as Nagisa shrugged off her uniform jacket to reveal her white tank top, her arms toned and tanned from countless hours in the sun. "You're only going to watch today."

Nagisa reached down and shimmied off her shorts, letting it fall to the floor. She stood there in nothing but her tank top and grey athletic panties. Her long legs and strong thighs were on full display, as were the rounded swells of her pert ass and her toned tummy. Noboru stood awkwardly, unsure if he should turn away to give his girlfriend some privacy or not. Nagisa didn't seem to mind as she kicked off her shoes and stepped out of her shorts. "So what's the first thing we'll learn today?"

Tanaka's gaze settled on the grape-fruit swells of her modest breasts in her grey sports bra as she pulled off her tank-top , and he smirked. "Today we'll be focused on teaching you how to use that body of yours to milk my big cock dry. No better way to learn than by experience."

"Okay!", Nagisa wasn't fazed as her expectations had been set by the rumors flying around from the couples that had already had their first sessions. It was full on sex and supposed to be incredible. Even Reina Kurashiki, a gyaru snob who was too good for all the boys in their school and supposedly had a couple of college age boyfriends and even a salary-man sugar daddy or two had been tamed by Tanaka's cock and was now trying to date him and following him around like a puppy.

"Right then," Tanaka seemed more serious and took control of the situation once Nagisa had stripped down to her underwear, "The first lesson is the importance of giving the man you're with a blowjob before anything else. Your first priority is to get your man hard."

"Ohh that sounds fun!" Nagisa chirped, "Do I need to get on my knees?"

"Right you are!" Tanaka laughed, "We'll start with me teaching you how to suck a cock properly."

He grabbed a blue mat and tossed it on the floor before him. "Get on your knees on this, so you won't hurt your legs."

"Right!" Nagisa grinned as she readily did so, kneeling on the mat before Tanaka and looking up at him expectantly as Noboru watched in quiet frustration, a growing bump appearing in his pants with his arousal as he looked at his girlfriend kneeling before his sex trainer, "Alright, so is this okay?"

"That's perfect. Now help me out of my pants. You're going to get used to this. As a good girlfriend and a future wife part of your responsibilities will be to drop to your knees and drain your man's balls with your mouth whenever he wants it."

"Got it." Nagisa reached up and opened his belt, undid his pants and unzipped it, her hands finding his cock through his underwear and freeing it, "There it is."

She seemed slightly stunned by it for a moment, staring in awe at the long, thick, tube of soft flesh that fell from his briefs and swung heavily before her, the huge smelly thing just inches from her face. It was definitely bigger than she had imagined based on the rumors!

The sheer enormity of it – longer than Nagisa's head from crown to chin – defied comprehension. She turned to Noboru, "Oh mai gaa! Can you believe this thing? It's huge!"

Noboru just nodded as Tanaka chuckled and allowed her to familiarize herself with it a bit longer as she grasped it in her hands, the sheer girth of it revealed by the way her fingers barely reached around it. "Will you take a picture, please?"

"Uh... yea." Noboru fumbled for his phone and captured the surreal image of Nagisa's radiant smile juxtaposed against Tanaka's monumental flaccid member as she flashed double peace-signs.

Tanaka chuckled, "Pose it with it like you're giving a sweet kiss to your Prince Charming."

Flashing a grin at him she formed a platform with her palms to cradle his cock and leaned forward, her lips pressing up against the fat tip of his member, planting a kiss on it before looking at Noboru's phone with a sugary sweet smile.

Noboru was struck speechless, his throat suddenly dry. Was this really happening? His girlfriend was enthusiastically kissing a NEET's massive dick while looking up at him with an eager grin!

"Perfect! You look awesome in that shot." Noboru said with a nervous smile before pocketing his phone, trying to believe if he acted like it didn't bother him, that it would stop bothering him. Besides basically every guy in school was going to be in his shoes if they wanted to get their license and some sort of relationship with a girl. The sooner they got through this, the sooner he'd have Nagisa all to himself and this ogre would move on to cucking some other poor bastards.

Nagisa giggled in response, a springtime chirp that belied the fact that she was about to practice sucking a massive cock. Tanaka merely looked down at her and smiled with an easy confidence as he fondled his mammoth flaccid member, "Alright Noboru-kun, let me point out something for your knowledge. Normally, when a female sees a big dick or a big set of balls, their pussies take over some brain functions in order to advertise their availability and interest, they instantly start dripping juices in their panties, their nipples pop out like exclamation points and they won't be able to hide it. In fact, they normally draw attention to it, wiggling their hips and flaunting their chests, their conscious minds unable to resist no matter how embarrassing."

Noboru blanched as Nagisa, still on her knees, looked at him sheepishly with an embarrassed blush on her cheeks and drew his attention to her hard nipples poking out through the thin fabric of her sports bra. "Ah.. You noticed already... Is this what you mean? Am I being too obvious?"

He noticed her bottom was squirming as well, her body desperately trying to ride out the effects of Tanaka's massive breeding organ. She was arching her back to expose her pert breasts even more through her thin sports bra and Noboru felt a deep sense of alarm at how quickly the transition was occurring in his girlfriend's demeanor.

"Alright Nagisa-chan. Let's move on to the next step, shall we? Giving a proper blowjob."

"I'm ready!" Nagisa squeaked, still a bit awestruck at the sight of Tanaka's cock and her arousal at the thought of having sex with such a big sexy stud.