Nurse's Office

Tanaka was pretty much free to do whatever he wanted with his school day, even without the normality aura earring.

His status as official sex trainer meant most faculty left him alone assuming his wandering had to do with his duties. And for those who did get their panties twisted, it was easy enough to say something like, "It's normal for you to not care what I'm doing right now." or even better, "You'd normally rush to the bathroom right now to furiously hump your hand rather than bug me." and they'd immediately scurry off.

So he proceeded to the nurse's office to secure that department's cooperation. He had big plans for his sex class room but the nurse's office was already conveniently equipped with a bed for easy sex sessions during the school day.

The door was closed so he tried the knob and found it was unlocked.

Stepping inside, he quickly spied the middle-aged nurse, Sayori Matsuo, who was sorting through some files.

"Hey! I need you for something!" he called out without any preamble.

The older woman was a brunette with hair in a messy bun that didn't seem very nurse-like to him. She had plain looks and a flat chest but he decided he still wouldn't mind seeing her wrap her face around his dick.

The look she was giving him was thoroughly unimpressed "I beg your pardon? Can I help you, Hajime-kun?" She asked in a voice dripping with disdain.

"Yes," Tanaka walked in and stood in the space before her desk, "I need you to start tracking which students are ovulating so that I can make use of them and impregnate them. I need to know when each girl in this school is at their peak fertility."

The woman's jaw dropped and her eyes grew wide behind her thinly framed glasses, "W-what! Hajime!!! You can't expect me to- What I'll do is call the authorities immediately-"

Tanaka stared at her, glasses flashing as he interrupted her, "What is exactly the problem here? Impregnating the girls is just part of my job as sex trainer."

She spluttered in disbelief, "That-That.. has NOTHING to do with it. It's sexual education! The point is to educate the students, to ensure that they become mature adults, not to- to-"

Tanaka cocked his head. He was pretty sure he's said nothing about mature adults when explaining his duties to this school or really given much explanation at all. Sex trainer just means sex trainer. And he'd definitely said something about population expansion in his big speech...

Matsuo-san was still going, "-not just having my office report each girl's cycle to you and letting you...have at them like some...breeding stallion!"

Huh. Tanaka considered that image of himself for a moment. He definitely enjoyed the comparison, "Breeding stallion? Like a racehorse? Does that mean you want to bet on what girl will have the best foal?"

Her face purpled in rage, "YOU ARE OUT OF YOUR MIND!"

He snorted and started undoing the front of his school slacks, "Aaactually, you are normally a closeted pervert, complete and utter immoral degenerate and once you see the size of my cock it will unlock your most closely held fetish and you'll delight in helping me impregnate all the girls-any girls-all the women-who attend this school."

The moment when he finished speaking saw something... fundamental about the woman change right before his eyes. It was like watching someone suddenly unwind a spring, how she carried herself changed.

Even a bit of the brightness in the woman's gaze seemed to fade as if some of her intelligence and drive just leaked out her ear like late nights methodically studying medical journals had suddenly been replaced with furiously flicking her bean to hardcore gangbang porn.

She blushed faintly, "My, you aren't wrong Hajime." Matsuo-san adjusted her glasses before leaning in to watch the progress of his hands intently "I've always had an interest in seeing virile men like you breed a bevy of nubile young girls to help repopulate our country."

Tanaka marveled. The change was so sudden, so complete and total. As if an entirely new individual had taken over her body.

"You're going to assist me by tracking all the girls' ovulation cycles so that I'll know which ones are at their peak fertility each month?"

"Oh yes, Hajime!" Matsuo-san exclaimed with excitement in her tone, "Provided you really are as well-endowed as you're rumored to be. That's perfectly alright with me. As the school nurse, it's my duty to make sure each and every female gets their share of your virile sperm so that Japan will get a whole generation of healthy and hardworking and well-hung sons!"

The woman stepped closer, her cheeks flushing as she focused on his slowly revealed cock, "And if you are going to impregnate girls I should of course be there to observe the...process...to ensure their safety and optimal health."

He flopped out his length, thick and semi-erect and watched as Matsuo-san's eyes became glued to it.

"Yesss...." she hissed, stepping even closer so she could reach out and tentatively run her fingers across the long and thick slab of beefy cockmeat was jutting out at her, its urethral slit dripping with clear precum. She rubbed his tip with her palm as she felt down his veiny length with her fingers.

She leaned in close, breathing in deeply of the scent of his cock, "Oh my, yes. It does smell like such a potent stud."

Her hand gripping the massive length before pulling the heavy flesh straight out in front of her and then she reached under to cup his gonads, rolling the loose sack between her fingers. Tanaka grunted as she examined his balls, measuring their weight and density against the backdrop of her palm.

"Oh, yes that is indeed a magnificent breeding cock if ever I've seen one. Perfect for putting babies in young virgin schoolgirls..."

Tanaka looked on in mild disbelief as Matsuo-san slowly stroked his cock and massaged his balls before finally leaning down and flicking her tongue out to lap at his drooling slit.

He looked around the empty nurse's office and then around to the open doorway to the hall beyond. Was this really happening right here? Was this really the nurse of this school, a married woman, going down on his cock?

She wrapped her lips around his cockhead and began to slowly suck him deeper into her mouth. Tanaka moaned, the older woman was very good, her tongue lashing over the crown of his cock, then swirling under the bulbous head, causing him to thrust his hips forward as his dick pulsed in her mouth.

As she slid more of his shaft into her mouth, the woman reached out with one hand to continue fondling his balls.

"You got a husband?" he asked.

Matsuo-san released him with a wet pop, "Unfortunately, yes Hajime."

"Why unfortunately?"

She looked up at him, a lustful expression on her face, "I haven't had a good fuck in a long time. He is a pathetic excuse for a man. Small dick. Little to no stamina. I don't even feel it when he's inside of me." She sighed, "The only pleasure I get comes from my vibrator or when I fantasize a out a real man fucking virgins, breeding them..."

"You don't feel bad about cheating on him?"

"He deserves it," she stated matter of factly before slurping his cockhead back into her mouth.

Damn! He had used the words immoral, degenerate, and pervert, hadn't he? He wondered if they'd been happily married five minutes go, part of a loving and trusting relationship. Then, BAM! With just a few choice words he'd turned the poor woman into an adulterous cock addict.

"So I was thinking about using your bed here for a sex training session this afternoon, Akino-san and Tomomi-san..." Tanaka murmured, reaching out to gently rub the back of her head.

Matsuo-san made some kind of approving moan as she sucked more of his cock into her mouth. Her tongue lashed around his shaft as she pumped the portion of his dick not in her mouth with one hand while continuing to roll his balls around in their sack with the other.

"Do you think that'll work out alright for you? This afternoon?"

"Certainly Hajime," the woman cooed as she stared in rapt fascination at the huge erection she'd coaxed from his body, "My bed is perfectly sized to accommodate the two girls, maybe even three if they are...close friends... And of course I should be there to oversee their instruction in proper sexual practices..."