Stimulate the male genitalia by hand to induce ejaculation, then observe whether mana is generated.
In name only—it was no different from a simple handjob.
There was no way to know what Amelia was thinking, but her hand felt shockingly cold, the first time he'd ever felt it.
"Before getting into the full stimulation, it's important to first make it swell up big enough that you can grip it firmly with your hand."
It was a touch utterly unimaginable from her usual rigid demeanor.
Grasping the shaft of his cock, she began to caress it, her fingers dancing lightly.
"Stroke it gently, like soothing a child, and rub up the glans with your thumb."
"Kuh!"
Siwoo hated Amelia.
And he hated being seen getting a handjob in front of others.
Yet what he couldn't deny was how incredibly good her hand felt.
Blood rushed to his lower abdomen against his will. He could vividly feel the soft flesh slowly swelling.
"Wow!"
"The pendulum moved! And he hasn't even ejaculated yet!"
As his cock hardened, the pendulum on the chalkboard vibrated toward Siwoo.
"I explained how mental arousal triggers mana generation, right? This is how it works for men—they produce mana just from getting excited. An insignificant amount, sure, but still."
Siwoo's cock had fully swelled, proudly standing at attention, while Amelia—rarely—let slip her personal opinion.
"Getting erections no matter the situation or circumstance. Men really are pathetic creatures."
Amelia briefly pulled her hand away from his cock.
Once erect, it wasn't going soft anytime soon.
Siwoo's impressive size—well above the Eastern average—remained rigid and throbbing even without her touch.
"Assistant Shin Siwoo, are you feeling sexually aroused right now?"
After five years of dragging him around, she knew exactly how to get under his skin.
The teasing lilt in Amelia's soft question was no illusion.
She was asking:
'After acting all cocky and refusing my nighttime service, you're this excited just from a little hand play?'
It was humiliating.
Amelia hadn't stepped up to demonstrate ejaculation induction for no reason.
Just as Siwoo knew her well, she knew him too.
She'd figured out exactly what made him feel shame and orchestrated this situation on purpose.
"No answer?"
Instead of pressing for a reply like usual, Amelia pressured him in a completely different way.
Her hand, which had merely toyed with him before, now gripped his cock firmly.
She formed a ring with her thumb and index finger, slipped his shaft through it, and began shaking her hand back and forth.
Slap, slap—the dry sound of skin rubbing.
With precise control, Amelia jerked him off smoothly without any lube.
And by watching his reactions, relentlessly targeting sensitive spots, his hips kept bucking involuntarily.
"Kuh... grrgh..."
As Siwoo grimaced, fighting the pleasure, the twins kept gasping in fascination, like they'd spotted something rare.
Perhaps finding her position awkward, Amelia placed one hand on his shoulder and ramped up the speed.
Each sway of her bright golden blonde hair tickled his nose with the mingled scent of expensive perfume and her body odor.
The pendulum's vibrations, which had started faint like a breeze, were growing in amplitude.
Amelia looked up at Siwoo's contorting face.
She rolled her eyes slowly, savoring his humiliated expression as if it pleased her.
Her breathing had grown quicker than before the handjob began.
"Why so quiet? Doesn't it feel good?"
The merciless Amelia whispered once more, her voice laced with rare emotion.
That her feeling was one of superiority was just Siwoo's rotten luck.
He knew resisting was pointless, but he had no choice but to endure.
Blowing his load right here would just make him her plaything, mocked indirectly.
Amelia clicked her tongue at Siwoo biting his tongue to hold back.
"Don't pull any useless tricks—just cum already. My arm's getting tired."
Her whisper was low enough the twins wouldn't hear, but her grip tightened.
The exquisitely calibrated pressure forced unbearable pleasure upon him.
"Urgh...!"
It had only been 15 minutes, but after holding off masturbation for at least two months, it was far too much.
The massive wave of pleasure, proportional to his delayed release, blanked his mind white.
"Whoa! Whoa!"
"It's coming out!"
*Spurt! Spurt! Spurt!*
In the explosive ecstasy flashing before his eyes, Siwoo's cock twitched and spewed semen.
Even as he came, Amelia didn't stop her hand.
It felt ruthlessly intent on squeezing out every last drop inside.
A dizzying orgasm rippled to his tailbone. As Siwoo finished, a hollow emptiness crept into his chest, followed by self-loathing and shame.
"See? Mana is generated the moment ejaculation occurs."
"Yes!"
"Professor Amelia, can we try next?"
In Siwoo's blurred vision, as he wanted to crouch and soothe his aching groin, he saw the pendulum shaking wildly.
And the twins, itching to hop the table for round two.
Amelia wiped the semen from her fingers with a handkerchief, then checked her pocket watch.
"We'll stop here for today due to time. Caretaker, you're free to return to your duties."
"No way!"
"We want to try too!"
Having cast a spell mid-air right before ejaculation to cleanly recover the semen, Amelia soothed the twins without even glancing at Siwoo and continued the lesson.
Siwoo stood dazed for a while before pulling himself together, grabbing his lab coat, and fleeing the second classroom.
2.
Siwoo trudged toward the archive in a half-dazed state.
He'd half-expected public masturbation disguised as semen extraction, but he never imagined receiving a handjob from that Amelia and putting on a humiliating cum show.
"Life's fucking... empty."
A gloomy rain was falling, perfect for a smoke.
Truth be told, it had felt good, and as Amelia said, there was something arousing about it.
How often does a beauty you've never even held hands with give you a handjob?
But no matter how he spun it, he'd been played by Amelia's schemes, and cumming in her hand after a pathetic 15 minutes still made his face burn.
Times like this, he envied Takasho, the masochism expert.
That guy would've bragged about the famously aloof Amelia personally jerking him off, even showing up at Siwoo's room to gloat.
Even more unsettling was not knowing if this was the start or end of Amelia's revenge.
He could only pray that witnessing his disgrace had soothed the insult of his second refusal that morning.
Worrying about trivial things was a luxury.
Siwoo still had archive sorting duty left.
The magic archive at the southern end of Trinity Academy was the largest building on campus. Legend had it that when it first opened, it was so packed there weren't even empty spots on the shelves.
But in the 21st century, hardly any witches visited.
As hierarchies equalized over time and basic magic tomes became museum pieces, few sought them out.
Thus, only confused witches or apprentices with sudden formula troubles showed up at this lonely place.
Without that, managing the vast archive alone would be impossible.
"Haa..."
Changed into work clothes, Siwoo ate a late lunch in the corner—stale, hardened bread.
Typical slave fare was barley bread blander than a sponge or watery oatmeal porridge.
It wasn't even despair-inducing anymore.
To Siwoo, eating was just nutritional maintenance.
"Gotta clean."
He finished in under three minutes and first sorted the books on the tables.
Even in this rarely visited archive, once witches started browsing, they'd scatter dozens effortlessly—over a thousand piled up today.
Still, archive cleaning was one of Siwoo's favorite times.
No one to watch or rush him. Finish properly, and he could curl up in a corner for a quick nap.
Above all...
"Ah, this was the issue."
He grabbed yesterday's book, hid behind the shelves, and flipped through.
To witches, these were dull basics, but to him, they were an ocean of info.
Sporadically browsing magic tomes, he'd absorbed centuries-old theses and foundational spells evenly.
As the saying goes, even a dog in a school recites poetry after three years—Siwoo, clueless about magic before his abduction, could now clumsily parse and draw formulas.
He pulled a crumpled paper from his work clothes pocket, jotted notes quickly with a pencil, and stashed it away lest anyone see.
A problem plaguing him for two weeks cleared up with the new formula; his mind felt refreshed.
Without these small joys of learning, he'd have gone mad long ago.
This harvest was enough for today.
After work and cleaning Amelia's research building, he'd breakthrough the stuck part at home with this new theory.
"Life doesn't always go to shit, huh."
Moping alone changed nothing.
Siwoo had one goal.
Draw a magic circle to connect to the modern world and escape this damned city.
That meant self-studying magic.
Thinking of chugging cold beer and devouring chicken back in Korea lifted his gloom a bit.
He gathered the scattered books from the tables, slotted them back neatly, and wiped the shelves with a damp cloth, not raising a speck of dust.
Checking and replacing the wizard stones engraved with preservation spells for book maintenance was also his job.
By the time everything was done, the sun was setting.
Climbing ladders to reshelve and clean had left his back aching.
Siwoo's routine—up at 6 a.m. for garden cleaning—ended at 6 p.m.
Normally, he'd head to the dorm, doodle magic circles, and sleep, but he had to clean Amelia's research building.
Pushing aside his melancholy, Siwoo headed to the research annex.