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That night, Associate Professor Amelia’s orders fell.

“Janitor, follow what I taught you. Clean my body thoroughly.”

Siwoo obeyed it without hesitation.

Like a remora clinging to her bare skin, he licked, sucked, and left deep, wet hickeys all over her warm, sweat-ridden body.

-Chuuup, chuuup

“Like this?”

“Haah... Y-Yeah... You’re not bad at this, Janitor...”

She had experienced the sensation of being caressed all over by his lips and tongue before.

However, enduring it while standing in a library, a place meant for silence, instead of lying on a bed made it all the more overwhelming for her.

Siwoo lifted both of her arms above her head and began licking and sucking the smooth skin of her armpits.

A faint, salty tang from her sweat filled his mouth.

This spot felt noticeably warmer than the rest of her body.

Tracing every curve of her armpits with his tongue, he indulged in every inch of her.

“Hnnngh...!”

Amelia shuddered from the ticklish sensation, but she had to play her role as the associate professor, she couldn’t lose her composure here.

She wanted nothing more than to tell him, ‘Don’t lick me there...’, but before everything, she had to let him complete his task.

“Jani...tor... D-Don’t just focus on one spot like that... Clean everywhere else properly...”

“Just a little longer.”

“Hiiih...”

Witches sweated too.

Amelia in particular, didn’t usually sweat much, but today, after everything she had been through, her skin was damp and sticky.

Watching Siwoo lick her armpits made her feel both ticklish and incredibly embarrassed.

She squirmed, rubbing her legs together as tears welled up from the overwhelming sensation of his skilled tongue.

Her lips trembled, her expression made it hard to tell whether she was about to laugh or cry.

“Ms. Associate Professor, I’ll clean the other side now.”

“W-Wait...Janitor...! Haah...!”

Just when she thought she couldn’t take any more, something happened that left her completely shaken.

-Drip

A sweet trickle of pussy juice slid down her wobbly, rubbing thighs.

This time, she was shocked in an entirely different way.

Amelia had always despised being tickled.

When Sophia playfully poked her side, she’d immediately get annoyed at her.

-Slurp, sluuurp!

Yet, what started as unbearable ticklishness gradually transformed into a strange heat she had never felt before.

Though his tongue tickled a place that wasn’t even an erogenous zone, her body burned up.

It made her think that perhaps Siwoo wasn’t the pervert here but her.

As she wrestled with that realization, her embarrassment and arousal increased.

After a while, Siwoo finally pulled his mouth off Amelia.

By then, both her thighs were soaked with juice, caught between ticklish hell and horny heaven.

“Haah... N-Not bad, Janitor....”

“You flatter me.”

“Next time, make sure you clean me just as thoroughly. And...”

She wished this was the end of it, but there was still another ‘lesson’ she had to give.

“There’s a lecture on the female body today. Follow me to the classroom right now.”

Her magic classes often doubled as sex education, with Siwoo as the demonstration model.

But today, she’d be the one who’s taking that role.

2.

Following the script, they teleported from the library to the lecture hall.

With the number of witches dwindling, and fewer apprentices as a result, Trinity Academy had many empty classrooms.

Well, even if that weren’t the case, no apprentice would stick around for lectures this late at night.

Among the many options, Siwoo and Amelia chose the second-period classroom where Odile and Odette once studied.

It was the same classroom where Siwoo stood naked, serving as a demonstration model, masturbating in front of an audience, or getting handjobs for all to see.

But today was different.

“Janitor, today we’ll be using my body for the lesson.”

“Yes, Ms. Associate Professor.”

Associate Professor Amelia herself was about to deliver a raw, uncensored sex education lecture.

She stood at the podium, wearing the same composed expression she used in all her lectures.

Just 30 cm in front of her stood Shin Siwoo, her ever-diligent student.

Neither of them had expected their lessons to escalate into this kind of roleplay.

“...”

Amelia felt mortified.

She wanted to run away from the shame she felt.

But instead, she threw off her cloak.

Thanks to Siwoo’s sucking and biting earlier, her pale, naked body was covered in reddish hickeys, glowing under the moonlight.

Right now, Siwoo was the only student there.

Being used as a ‘teaching tool’ was humiliating enough, even without the ridiculous act itself.

And yet, because of Amelia, Siwoo had once been forced to disgrace himself in front of the twins.

Now that the shame was hers to bear, she felt she had no right to run from it.

This was a lesson meant solely for Siwoo, a chance to set right their tangled past.

Amelia resolved to push through this ordeal and face Siwoo more head-on.

“Janitor, look here.”

With that firm resolve, she hesitantly spread her legs.

Now that not a single piece of clothing covering her body, her damp thighs and glistening, wet pussy were laid bare for Siwoo to see.

Her acting was reaching its peak, having renewed her mindset to fully meet his expectations and starting to adapt to this awkward role-play.

She climbed onto the teacher’s desk, spread her legs to expose her pussy, looked down at Siwoo with a haughty expression that seemed to say, ‘Why would I be embarrassed showing my naked body to a worthless slave?’ and ‘This is just part of the lesson. It’d be weird if I feel embarrassed over it’.

“Yes, Ms. Associate Professor. I’m looking.”

“Before we begin the lesson, I’ll explain the names of each part and our current situation.”

Not that he wasn’t already staring intently.

After all, he had seen Amelia’s pussy up close more than once.

But seeing it while she was in her bitchy ‘professor mode,’ was a completely different experience compared to when she was in submissive ‘slave mode.’

“This protruding area here, covering the pubic bone, is called the mons pubis. Some call it the mound of Venus. Mine has hair, but some women don’t have any. When lying flat, it tends to stick out more.”

Her tone remained calm and composed, her explanation precise.

It was like the return of the domineering Associate Professor Amelia, who once ruled the twins with an icy voice and unshakable authority from the podium.

Although the lesson itself was...unconventional...

“These swollen parts here are the labia majora. The name translates to ‘big lips,’ and as you can see, they’re thicker and softer than normal skin. Janitor, would you like to feel them?”

“Yes, Ms. Associate Professor.”

Siwoo, seated right at the front, reached out.

His fingers pressed into Amelia’s soft, jiggly folds, kneading them gently.

They were plush, with a pleasant elasticity that pushed back against his touch.

“How does it feel?”

“It’s soft.”

Before Siwoo could ask anything, Amelia continued her explanation.

She pointed to each part of her body with her fingers, continuing her explanation in a calm, low voice.

“Inside the outer lips are these inner lips, the labia minora. There’s a myth that their shape and color change based on a woman’s sexual history, but that’s mostly false.

Genetics primarily determine the size, shape, and color.

In my case, mine barely stick out; they’re small with a bright pink color. ”

“Ms. Associate Professor Amelia, even this part of you is beautiful. Like flower petals.”

“Stop the flattery and focus on the lesson.”

When Siwoo playfully stroked her folds, Amelia’s voice trembled as she shot him a sharp glare.

“Where the inner lips meet, there’s the urethral opening. Like the anus, it’s a vestigial organ witches no longer need.”

Amelia’s slender fingers gently spread her lips, revealing a tiny hole that looked too small to fit even a cotton swab.

“...”

Amelia swallowed hard.

Even as roleplay, this was undeniably perverted.

Exposing and explaining her private parts in front of him was deeply humiliating, and yet this was her salvation.

This unusual method would allow her to atone for the mistakes she thought were beyond redemption.

“And above the urethral opening, where the inner lips meet, there’s a point. At the tip is the clitoris, or clit—a major pleasure zone.”

“This part of you is pretty too.”

“...Enough with the comments, Janitor.”

Slightly swollen with arousal, Amelia’s little bud peeked halfway from its hood, twitching subtly.

Though already wet enough, Amelia quickly sucked her two fingers, coating them with saliva, then gently rubbed her clit.

“If you massage it softly like this, like soothing a baby, it’ll give the woman pleasure. It doesn’t grow as dramatically as a penis, but it swells and hardens immediately.

Right now, it’s fully erect from our sex and constant touching. Still, for the lesson’s sake, I’ll demonstrate.”

Amelia’s fingertips stroked her BB-pellet-sized clit, making it shift slightly under her touch.

She was already soaked from the repeated penetration and foreplay.

As she continued to tease her sensitive bud, clear juices dripped out.

It was an obscene, almost drool-like fluid.

“When a woman gets turned on... She gets wet, just like this. This means she’s all-ready for penetration. As you can see, I’m plenty ready, right?”

Amelia stopped touching herself and spread her pussy lips open.

Even stretched wide, the impossibly small hole and the quivering inner flesh looked incredibly erotic.

“You look... more than ready.”

“Let me summarize it once more. Today’s lesson is about exposing all my sensitive spots until I could cum from just a light touch. Now, put your dick inside and find those weak spots yourself.”

Siwoo had been struggling to control his urge to thrust into her.

He positioned himself and slid in properly once again.

“Ah....!”

Despite everything, Amelia’s body was fully prepared to take him.

She bit her wrist to muffle a moan, but quickly resumed her blank professor expression, staring directly at Siwoo.

Before going deep, Siwoo angled his cock upward, stimulating the roof of her pussy.

This was obviously where her G-spot was located.

“Ngh...! First... Janitor, there... keep hitting that spot.”

Amelia’s sex education had quickly transformed into a hands-on lesson in sex itself, and things were just getting started.