Eviros's Happiness
"Kkieek! Kkikhikhikhik! It's complete! It's complete! I've finally done it properly!!!"
In one workshop, a short, black-robed mage was inwardly howling with immense joy over his achievement.
'What do you mean, "just black magic driven by lust!" What do you mean, "useless for hunting!" Just you wait! You damn bastards in the Mage Guild! I'll be the one to change the world!'
The man's name was Eviros. He was a mage who researched black magic—specifically, the lewd variety used by succubi and incubi.
His origin story began in childhood, when he was thirsty for water and accidentally peeked through a door crack to see his parents having sex.
"Aaang♡ Euung♡ Honey♡ More♡ Moreee♡"
"Uuugh! Honey! You like this? This feels even better, right!"
"Aaang♡ Honey, you're killing meee♡♡"
Normally, witnessing parents' intercourse at a young age could become a trauma. But what caught young Eviros's eye was his parents' blissful expressions.
'Wooow......'
Eviros watched his parents' sex with sparkling eyes. From that day on, he ingrained the idea that sex was something very good and happy.
Even as he grew up, discovered his talent for magic, and entered magic school, that belief never changed.
I want to make people have as much pleasurable sex as they want! That motivation always burned inside Eviros.
That's why he delved into black magic—specifically, the lewd branch favored by lust demons.
"What? Black magic? If you're learning magic, shouldn't elemental be the basics, you idiot?"
"Researching such vulgar magic...... Are you planning crimes or something?"
"Ugh, gross. Get lost."
Those around him scorned, despised, belittled, and ostracized Eviros.
At first, it didn't faze him. He was just walking his own path anyway.
But his dream hit a crisis midway.
"You think we'll approve such vulgar thesis! Don't even dream of research funding!"
"H-How can that be! Professor! Why! Th-This will make the world even happier......!"
"Shut up! Only lust demon worshippers would like such magic! Get out!"
To at least graduate from the Magic Academy, Eviros wrote a thesis on elemental attack magic that he didn't want to touch.
Though he faced despair once, Eviros didn't give up and tried to pursue his dream in the Mage Guild.
But the treatment there was the same. Useless magic. No help for hunting. Vulgar magic only demons would use.
The magic Eviros created to make the world happier and better was treated as trash by fellow mages.
Still, Eviros couldn't give up. He couldn't abandon the research he'd dreamed of since childhood.
With no support, he scraped together every coin he had—and didn't have—in his makeshift workshop to continue.
As he researched alone, the voices mocking him echoed in his ears.
His heart twisted more with each iteration of research. Before long, his dream of everyone easily enjoying pleasurable sex twisted into exposing the lewd, vulgar true nature of humanity.
'This is just the first step...... I'll keep experimenting, evolving the research further. And at the end...... Those who looked down on me will bare their lust and realize how superior my magic—my research—is! Kuhahaha!'
After endless research, Eviros created his original magic: Yinmun Engraving.
With no succubi or incubi around, he'd pieced it together from ancient texts alone—a black magic achievement.
For now, it only allowed the enchanter to control contraception and mild arousal.
But Eviros believed repeated use and refinement would lead to massive breakthroughs.
And finally, mass forced Yinmun Engraving spells to spread them across villages, cities, even entire nations.
Turning everyone into beasts in heat, driven mad by lust, fucking nonstop.
Pleasurable, happy sex? Screw that. Sex was inherently pleasurable! Even if they lost reason and became animals, they'd end up doing it anyway.
Eviros had lost his innocence, driven now by warped desire to advance his research.
And the first place he targeted for Yinmun Engraving was Sliem.
Any place would do. He chose Sliem because it was closest to his workshop.
'First, infiltrate Sliem's night streets to test its power. If they can raw-dog without Pi-Im Slime, brothels will boom too......'
Eviros entered Sliem and headed straight for the night district.
'Kuhuhuhu, turn this place into a city of sex in a month...... Huh? Uuung......?'
Then, while walking the streets, something caught his eye.
A ranger-type female archer in revealing clothes exposing her midriff.
'Th-That......!'
A pattern was engraved on her lower abdomen. Not fashion—it was the pattern from Eviros's obsessive research: a yinmun.
'Th-That pattern......?!'
A normal yinmun would have just mildly surprised him.
But this wasn't ordinary. As a dedicated researcher, Eviros could tell.
The yinmun on the archer was several times superior to his own.
It's not just mild arousal—it could induce full heat. And the engraved doesn't control it; the bearer can handle contraception and pregnancy herself?! I-Impossible! I haven't even developed that yet!'
Eviros, who'd been heading to the night district, turned to follow the archer.
She was chatting with a warrior-looking man beside her.
"Haa, what do we do. The festival's coming up soon......"
"Yeah. We're fine, but...... what about the guys who couldn't join last time?"
"I know they want in, but...... without this, it's too risky, right?"
"If something happens, it's big trouble. Haa, if only Hypno were here."
"Hypno left a few days ago. What can we do, thinking of someone who's gone?"
"Haa...... Hey, know anyone who can do that?"
"I'd have found them already if I did."
"Right~."
The archer and warrior conversed in tones of regret and distress.
But Eviros, fixated on the yinmun, didn't register their words.
How does such a perfect yinmun exist? A lust demon? Succubus or incubus in the city? No, they wouldn't expose it so boldly in daylight! Then what...... Aaa, so curious, so curious! I wanna inspect it closer!'
Overwhelmed more by scholarly zeal than inferiority, Eviros charged at the archer.
Tadadadak!
"Huh?"
The archer turned at the running footsteps.
Screeech!
Eviros skidded to a halt right in front of her, dropped to his knees, and grabbed her waist.
Thud!
"Euung!?"
"Ooooh! So this is what it looks like up close! Now I see even better! What is this pattern! The color, the shape—perfection! It clings perfectly to the skin! Perfect fusion with the body, no flaws! And from this, it's linked to the womb for maximum effect...... Aaa, the texture......!"
Rub rub. Eyes wide, fixated on the yinmun, Eviros stroked it with both thumbs.
"What?!"
"Aaa, no smudging at all, and it doesn't waver even with a bit of mana! As expected! Even without being a lust demon, to engrave it so perfectly! Who did this! And this smooth texture! ......Wait, that's just her natural skin......"
"What the hell, you pervert!"
Slap!
"Kuhaaaack!"
Eviros tumbled to the ground from the archer's slap.
"Touching my stomach out of nowhere! What a creep. I'll beat you more......"
She cracked her knuckles approaching.
"W-Wait, Aesilla."
The warrior grabbed Aesilla's shoulder.
"What, Dunk. Defending a pervert?"
"No, listen. Did you hear what he said earlier?"
"Hear what?"
"He saw your yinmun and marveled that even without being a lust demon, it's perfectly engraved."
"So what! Engraving yinmuns...... Engraving? Huh?"
Aesilla switched from anger to curiosity, crouching by Eviros.
"Hey, why'd you touch my stomach?"
"Ah, uh."
Rubbing his slapped cheek, Eviros realized what he'd done and stammered excuses.
"S-Sorry...... It was so perfect, my scholarly passion just......"
"Scholarly passion...... You're a mage?"
"Y-Yes."
"From what you said, seems like you can engrave yinmuns. Right?"
Gulp......
Eviros hesitated at Aesilla's question.
What if revealing he could engrave them led to scorn? Like the rotten bastards at the academy and guild?
But greater was the fear of another slap if he didn't speak.
He nodded.
"Y-Yes."
Dunk and Aesilla exchanged glances, faces lighting up.
""We found him!""
Dunk helped Eviros up, brushing dirt from his black robe.
"Oops, scholarly fervor, huh! Sorry, didn't realize!"
"Can't help it if it's passion for knowledge! Mages are like that sometimes! Sorry for hitting you!"
"N-No...... It's fine. My fault too......"
"Kuh! What a big heart. Hey, Aesilla. When the festival starts, you get first dibs."
"I'd do that anyway. Really sorry, does it hurt?"
Aesilla touched his slapped cheek, leaning close.
"Ugh...... I-It's, f-fine!"
Lifelong solo virgin Eviros—his life equaling research and celibacy—blushed and sweated at the pretty Aesilla's near face.
"Glad you're okay!"
Her beaming smile up close was violence to his virgin heart—even from the woman who'd just slapped him.
Then Dunk stepped forward.
"Pardon, but could you come with us? We need your...... no, Master's skills badly!"
"Y-Yes? My skills needed...... Where......?"
"Of course......"
"Naturally......"
Dunk and Aesilla gazed at Eviros with hopeful eyes and shouted together.
""The Adventurer's Guild!""