A Man and Woman Who Gain Magic Power from Lewd Acts (Revised) #3
A Man and Woman Who Gain Magic Power from Lewd Acts (Revised) #3
The moment I opened my eyes in the morning, I started practicing hand seals with the magic book.
Back in the old days, I would've just slept straight through until noon.
My ruinous lifestyle had changed ever since I got my hands on that magic book.
The old me was a worthless incubus who'd lived a lazy life despite being a trash-tier race.
I'd been steeped in that loser mentality — I'm an incubus, so nothing I do will ever work out — and never really tried to live with any effort.
But once I got the chance to learn magic, hope started bubbling up.
The hope that maybe, just maybe, I could escape this godforsaken bottom-feeder life.
I finally had some serious motivation to pour everything into my magic training.
Of course, I couldn't just train magic until I starved to death.
I was planning to head over to the Adventurer's Guild around the afternoon to look for new requests.
But just as the hours passed and I was about to set off for the guild building, a reason to cancel that plan showed up.
A familiar guest had come to my inn room.
Knock knock!
An urgent knocking sound.
"Luke. I know you're in there! Open the door, quick!"
"Rebecca?"
I opened the door and met eyes with the red-haired swordswoman standing in the inn hallway.
Rebecca, who I'd parted ways with so casually last night, had shown up again.
I'd figured I'd never see her again.
"C-can I come inside?"
"Did you leave something behind yesterday?"
"No, that's not it... There's something I absolutely have to ask you. Please, I'm begging you, just give me a moment..."
"If it's just a moment, sure."
She had the look of someone ready to shove her way in even if I said no.
So I readily allowed Rebecca into my room.
Soon enough, she was kneeling on the floor, explaining the reason she'd come back to find me.
"Something strange happened to my body today."
Was it the pheromones?
Was her body still in heat, still feeling horny even now?
She didn't look particularly aroused, though.
"Stop dragging it out and just spit it out. What's this strange thing?"
"You know what mana is, right? I mean, you're a mage — you must have at least learned how to sense mana."
"Obviously."
"I learned how to sense mana from my teacher too. It's a different method from yours, something I awakened during my swordsmanship training."
Of course she'd have learned how to sense mana.
Rebecca's teacher was a Sword Master — the pinnacle of warriors. There was no way she wouldn't have taught her disciple at least mana-sensing techniques.
"I just realized something. The mana inside my body has increased. It's incredible."
"That's great news. Should I congratulate you?"
Rebecca was telling me about her mana increase with an incredibly happy expression.
I figured some kind of reaction was called for, so I clapped.
"Incredible. Absolutely incredible. Miss Rebecca's mana increased. Mine increased this morning during training too — how about a little congratulations for me?"
"Your situation is different."
What's so different about my situation?
Mana increasing is a perfectly normal phenomenon.
It's basic common knowledge: mages train magic to gain mana, martial artists train martial arts to gain mana.
She probably built up mana from the real combat experience of fighting Rotten's gang last night.
Even I, who had zero connection to mana, knew that much.
"My body is constitutionally incapable of accumulating mana."
"What?"
But after hearing what she said next, I had to rethink things.
"The nerves that take in mana are broken. Other than the mana I was born with, it's impossible for me to accumulate any new mana."
"So you've got some kind of special constitution?"
"Something like that. The human brain has a special organ that controls mana, and the more developed that organ is, the easier it is to sense mana. But the nerves in my brain are only half-functional."
Rebecca raised a finger and tapped her forehead.
"I can sense mana, but I can't accumulate it. My brain refuses to accept external mana into my body. So I'm fated to never be able to increase my mana for my entire life. No matter how much I swing my sword until my wrists shatter, I can't grow stronger as a martial artist."
"Hmm..."
I didn't fully understand what she was saying.
This was the first time I'd heard about a brain organ that controls mana.
But I did get that Rebecca had a special constitution that made it impossible for her to accumulate mana.
"Mana that never increased no matter how much I trained my whole life suddenly increased today. Even when I got back after finishing that request, there wasn't any change at all. So there's only one thing I can think of. Something happened between us last night."
Something happened?
What happened between us last night was drinking, a brawl outside, and that accident caused by the pheromones. That was it.
"Did your mana increase while we were drinking? Or did you have some kind of awakening while you were pounding those hand seals into those guys?"
"I don't think it's either. Back in my homeland, I drank plenty and threw plenty of punches."
A life of drinking plenty and throwing plenty of punches, huh.
You've lived quite the rough life, Miss Rebecca.
Are you the Kim Du-han of the Zakarta Kingdom or something?
"Just so you don't get the wrong idea, every bastard I've beaten up had it coming. Most of them picked a fight with me first. I'm not some thug who goes around beating up random people."
"R-right, I see."
"Why are you suddenly using formal speech?"
For a moment, Rebecca had radiated such intense bully-girl energy that I'd flinched.
I scratched my cheek and quickly changed the subject.
"Maybe the incubus pheromones stimulated your brain."
"Pheromones?"
"If we rule out everything else, it's gotta be the pheromones. During those twenty minutes yesterday when you got put into heat by the pheromones, maybe something happened to your brain?"
I didn't really know what I was talking about — I was just saying whatever came to mind.
"We could find out if we tried using the pheromones on your body again. Whether the pheromones have some connection to the change that happened to you."
"H-having that kind of embarrassing experience again is a bit..."
Rebecca lowered her head and mumbled hesitantly at my suggestion to sniff the pheromones again.
I got why she'd hesitate to sniff pheromones and be forced into heat again.
Being stuck in a state of constant arousal without being able to climax properly would feel like torture.
It was like getting hard watching some fucking arousing porn but being unable to get off — wouldn't that be agonizing?
If she didn't want to, I had no intention of forcing the pheromones on her.
Instead, as a two-year resident of Yoen-su, I came up with another idea.
"Let's go to the library."
I cupped my chin with my thumb and forefinger and spoke.
I thought it was a pretty cool-looking pose.
"If you've got questions, you go to the library. You can find out just about anything there, except the stuff that isn't in the books. Isn't that amazing and mysterious?"
"You're saying something totally obvious while acting like you're being profound."
"Nothing wrong with a little posturing. Anyway, there's a big library in Yoen-su. The lord of this town is a hardcore bookworm, so he built a library with tax money. Let's go there and dig through every book about incubi."
"Got it."
Rebecca nodded with an expression full of enthusiasm.
It wasn't like sitting around doing nothing was going to solve the mystery anyway.
In this medieval fantasy land, the library is the surest place to find new knowledge.
In fact, ever since I reincarnated, I'd built up most of my knowledge about this other world through books.
"Thanks for thinking this through with me. I'll treat you to another round of drinks later."
"I can order something more expensive than 10 copper this time, right?"
"Yeah. You can empty my wallet and eat something delicious."
"Hah, fucking awesome."
*
Yoen-su Municipal Library.
That was the place Rebecca and I had arrived at after leaving the inn.
"So we need to read books about incubi. We should be able to just scan through every book on that shelf over there."
We went into the archives, and together we gathered every book related to incubi we could get our hands on.
A little while later, we sat facing each other and began our serious reading session.
Obviously we didn't have to read every single book we'd grabbed from cover to cover.
The only thing we wanted to know was the connection between incubus powers and mana.
We just needed to focus on the sections where mana was mentioned.
"Nothing here."
"Nothing here either."
We'd checked most of the mountain of books we'd piled up, but there were no results. As time passed, I brought new books from the shelves, but the information we were searching for was nowhere to be found.
A case of a woman charmed by an incubus having her mana increase.
That was the one thing I wanted to find among countless books. Instead, I'd just piled up useless knowledge.
Like the knowledge of the 48 sexual positions developed by incubi.
The illustrations were so hot I almost got hard.
"Hoo..."
The investigation had failed.
After checking the last book, Rebecca let out a sigh of disappointment.
"Then I guess we have no choice. I'll have to try sniffing your pheromones one more time."
"Didn't you say you didn't want to earlier?"
"But there's no other way. Rather than keep you tied up here, I'd rather just take a good lungful of pheromones and confirm it."
"I like that. You're an awesome woman."
"What's an awesome woman supposed to be? Anyway, let's get out of here. Let's go somewhere like an inn and you can just blast me with pheromones once."
After wrestling with it, Rebecca ultimately chose to take another dose of pheromones.
The fact that she'd choose to go into heat — something she'd absolutely hated — showed just how intensely obsessed she was with mana.
Well, it would definitely be a lot faster than digging through books.
But there was exactly one book I still needed to read.
"Hold on."
"Hm?"
"There's something I want to check. There was one book I still haven't read. Wait here."
"Fine, go get it."
Rebecca sent me off without any particular expectation.
I quickly pulled a book from the archives.
It was a book I'd had my eye on every time I visited the library.
I'd always thought I had to read it someday when I had the time, but I never imagined that day would be today.
"The Origin of the Incubus."
That was the title of the book I'd chosen.
When I came back holding it, Rebecca's eyes went wide at the thickness of the volume.
"W-wow, that's a really thick book. You could kill someone if you hit them with the corner of this thing."
"The thicker it is, the better the chance we'll find something, right?"
I planned to wrap up our investigation with this.
Rebecca and I sat down and looked through the book together.
"Flip through it fast. I want to get out of here and just end this by sniffing the pheromones."
"Yeah, yeah."
I told Rebecca I'd read quickly, but honestly I had no intention of just skimming through it.
Because "The Origin of the Incubus" was a book I'd wanted to read thoroughly for a long time.
Every time I came to the library I thought about reading it, but the sheer volume of it always made me hesitate.
I started reading carefully from the first page.
- The incubus is a demon race originally born within dreams. In a dimension completely separate from this world, there exists a dream world called DreamLand, and the incubus was originally a resident of that place.
- The female residents of DreamLand called themselves succubi, and the male residents called themselves incubi. Both succubi and incubi are treated as the same dream demon race, but this text will deal in detail with the incubus, the male form of the dream demon.
"Now this is some novel stuff. My race was born in dreams?"
What a fantasy-esque race origin myth.
Well, I guess that's par for the course in another world?
Every child on this continent basically gets their home education through fantasy tales, I suppose.
- Why the Dream Demon Clan abandoned DreamLand and crossed over to the continent is unknown. However, according to records in ancient texts, one intriguing hypothesis can be formed: that the Dream Demon Clan did so because they were 'horny.'
- Every night, the different races of the continent entered the dream world through sleep. The ancient Dream Demon Clan would fuck these other races without question or answer, but at some point, dream sex alone was no longer satisfying. The Dream Demon Clan wanted to thrust into living, breathing creatures, and to be thrust into by them.
"Well, shit...."
The content on the page suddenly became incredibly engrossing.
That was because every single page had dirty illustrations attached.
A succubus making an ahegao face while riding cowgirl and shaking her hips.
Incubi all mixed together in one big group gangbang.
Was it because they were in a dream that any kind of play was possible?
One illustration even showed a woman having every single hole violated by an incubus that had transformed into tentacles.
If I weren't in a public place, I'd have already busted one out.
Tentacle play? Was this written by an incubus who actually knew his stuff?
"Ah—!"
I'd been staring hard at the illustrations for a while when I flinched in surprise.
Rebecca had poked me sharply in the side.
"You— you perverted bastard! What's with you just gawking at the pictures like that!"
"Calm down. Illustrations exist to aid in comprehending the text. The more closely you examine the illustrations, the deeper your understanding of the book becomes."
"What if people see us looking at this?"
"Is now really the time to worry about other people watching? What if we skim through and miss something? We're doing our final investigation, so shouldn't we be reading it thoroughly?"
"You always have to have the last word, don't you? Hmph."
Rebecca had her face buried in her palms because of the obscene pictures that had suddenly appeared.
But the way she kept sneaking peeks at the book through her fingers... She did have some sexual curiosity after all, I guess.
"Hik."
It was pretty cute how she kept reacting with surprise every time she saw the illustrations riddled with deviant fetishes.
I kept smoothly reading through the book.
The book went on to explain the obscenely swollen sexual appetite of the incubus.
Rebecca, examining the book beside me, was gradually realizing the true nature of my race.
"Your species is seriously open-minded, huh. Losing your virginity before the age of ten is a tribal custom of the Dream Demon Clan... That sounds a little insane. It feels like everything I thought I knew is being turned upside down."
Through the book, I was able to learn about various characteristics of incubi that I hadn't even known myself.
Of course, they were all such vulgar characteristics that it felt awkward even explaining them out loud.
"Ah, found it."
It was just as I was endlessly flipping through pages with my fingers.
When we reached almost the very end of the book, Rebecca and I were able to discover the information we'd been looking for.
- In extremely rare cases, some women who have sexual relations with an incubus experience a special phenomenon. That phenomenon is the increase of mana within their bodies.
"Just as I suspected."
"I-it actually exists? That the mana increase really was because you're an incubus?"
The moment that passage appeared, the look in Rebecca's eyes changed.
She opened her eyes wide and began to read the book with intense concentration.
- This astonishing and mysterious phenomenon begins when an incubus meets a woman with whom he has 'compatibility.' The compatibility referred to here is the compatibility of mana between the incubus and the woman. When the wavelengths emitted by each other's mana achieve perfect harmony, the incubus's body undergoes an incredible transformation.
- At that moment, the incubus acquires a property akin to a conductor that mana can easily pass through. He simultaneously absorbs natural mana into his body and then shoots it toward the partner with whom he is having relations. As a result, after sleeping together, both the incubus and his partner can enjoy the effect of increased mana.
"No way...!"
Rebecca wore a shocked expression as she read the book.
Of course, I was just as surprised.
To think that incubi, whom I'd only thought of as lascivious, had such an incredible ability.
An ability that transformed them into an easy conduit for receiving mana, thereby strengthening their partner.
- Academia refers to an incubus that has become a mana conductor as having reached the 'Trance State.' However, cases of discovering an incubus who has reached the Trance State are extremely rare. This is because for an incubus to transform, he must first meet a woman whose mana wavelength matches his perfectly — a probability so low it practically converges on zero.
By the time I finished reading the book, I realized why the incubus's ability wasn't widely utilized.
It was simply a matter of probability.
Meeting a partner with whom you had perfect mana compatibility was a truly difficult thing.
According to the book, scholars had been unable to turn an incubus into a conductor through any other experimental methods.
Rebecca, her face gone utterly pale, asked me.
"So, to summarize... it's because you and I have good compatibility?"
"That's right. It means we've got good sexual compatibility and good mana compatibility. The two of us are a match made in heaven. We can accumulate mana just by constantly doing lewd things."
"That's insane...."
Rebecca stared up at the ceiling with a dumbfounded look.
While she did that, I raised my hand and touched my abdomen.
The book had said that not only the partner, but the incubus who had entered the Trance State could also enjoy the mana amplification effect.
To be honest, I hadn't even realized my mana had increased until now.
It hadn't been long since I'd learned to sense mana, so I wasn't normally very conscious of it.
But when I checked the sensation in my abdomen, I could tell that the mana inside my body had increased a little.
It was a small amount of mana, the kind you could easily obtain just by practicing magic.
"The mana we obtained last night isn't all that much."
"You mean the efficiency is bad?"
"It's too early to conclude it's bad. We spent last night stuck apart from each other in a state of heat, but we didn't actually do anything really lewd. No caressing, no penetration."
"Th-that so?"
"We didn't do anything in a state of heat, yet we obtained mana roughly equal to what you'd get from training in magic. If we do something really lewd, the efficiency is going to be far better than magic training. If we use this Trance State properly, we might be able to accumulate mana several times faster than anyone else."
"Aahh..."
Rebecca clutched her head and let out a sigh full of internal torment.
The girl, for whom accumulating mana had been an impossibility her entire life due to her constitution, had finally found the sole method to obtain it.
But that method turned out to be doing lewd things.
And with some lewd-looking incubus, no less.
After putting the book back in its place, I spoke to Rebecca.
"Let's get out of here and talk. Let's get some fresh air outside and decide things calmly."
"Mm, okay."
I took the bewildered Rebecca and walked out of the library.
*
Outside the library building, a small garden was laid out.
Flowers were blooming profusely in the garden that the library staff maintained.
Since there weren't many people around, Rebecca and I decided to have our conversation here.
"So, have you made up your mind, Rebecca?"
"Ma... made up my mind about what...?"
"Didn't you need a way to obtain mana? You said your brain's mana nerves are damaged, so you can't accumulate it through ordinary methods. Do you want to stick with me and keep doing lewd things?"
An incubus who has entered the Trance State increases his partner's mana.
Apparently, this mana is forcibly injected into the partner's body regardless of her will.
This meant that mana would accumulate in Rebecca's body whether her brain rejected external mana or not.
"I do want to build up mana, but..."
Rebecca looked at me, a hesitant expression on her face.
"Entrusting my body to a man I barely know is a bit... I was always taught back home that I had to be very careful about my chastity."
What was holding her back was the purity-centered mindset of her homeland, the Zakarta Kingdom.
You must not carelessly defile your body with a man outside of marriage.
The doctrine she had been taught since childhood was suppressing Rebecca's desires.
"What's it matter? You're not in your homeland right now. This continent has a lot more loose women than you'd think."
"..."
"Meeting each other was heaven-sent luck. The book said that an incubus meeting a woman with compatible mana is a rare probability. A miracle like this isn't likely to happen again."
"Th-that's not the point! I'm not some street corner prostitute selling my body. I want to gain mana, but there's a line I have to uphold..."
Rebecca still couldn't shake off her hesitation.
Watching her fidget with her fingers, I started to grow anxious.
To put it bluntly:
Ever since reading The Origin of the Incubus, I'd become heavily fixated on Rebecca.
To think I could gain mana just by doing lewd things.
It was a creation economy that literally made something out of nothing.
On top of that, there was another reason I absolutely could not let Rebecca slip away.
If we're going to do lewd things, we'll have to stick together. That means Rebecca becomes a fixed party member with me. The Adventurer's Guild has party quests that can be done even with just two people. If I move around with her, the number of requests I can take on increases drastically.
From an adventurer's perspective, this was a once-in-a-lifetime opportunity.
An incubus adventurer like me forming a fixed party was something I'd never even dreamed of.
If Rebecca joined me, a two-man adventurer party would be born in that instant.
I probably didn't need to explain how a duo was a hundred times, a thousand times better than being a solo-rank warrior.
I didn't want to lose Rebecca at all.
So I racked my brain and persuaded her earnestly.
"Rebecca, the reason you're hesitating is that you don't trust me, right? You can't entrust your body to a man you don't know at all."
"W-well, yes? Doing nighttime activities together is something you should only do after you deeply understand each other..."
"How about this then? We take a set period of time for the two of us to accept each other. Let's take on adventurer requests together and get a feel for working as a team."
"Get a feel for... working as a team?"
"When that time period is up, if I don't suit you, you can leave immediately. That's your choice. Roughly a month of working together should be enough time to get a grasp on each other. So, here's the deal..."
I felt like I needed to project some forcefulness from this point on.
Clap—!
I abruptly seized Rebecca by the shoulders.
After gripping her shoulders tight so she couldn't back away, I opened my mouth and spoke with the intensity of an alpha male.
"Agh! What's with these hands!"
"Form a fixed party with me, Rebecca."
It almost felt like I was proposing to a girl I liked.
If you swapped the words "fixed party" for "baby," wouldn't that be a perfect confession line?
It felt a little embarrassing.
"A f-fixed party?"
"Let's stick together for a month while we clear quests. Honestly, don't you need someone at your side who can explain things to you? You're a newbie adventurer, so there's a lot you don't know. I can teach you everything from A to Z."
"Hng..."
Rebecca's earlobes were flushed red from the sudden physical contact.
Was she not used to men coming on to her so boldly? She couldn't seem to find a place to rest her eyes.
She must have been really surprised — I could see tears welling up in Rebecca's eyes.
A brief silence passed.
At last, Rebecca opened her mouth.
"A-Alright! I said alright! So please just let go! Please...!"
"Really? You'll be in a fixed party with me?"
"Y-Yes! I'll be your fixed whatever, so just let go now...!"
Success!
Rebecca accepted the fixed party proposal!
A tingling sensation shot through my entire body. I threw my arms up and let out a cheer.
"Yay!"
The day had finally come!
The lonely solo-rank warrior Luke, wandering the Midgard continent.
Finally escaping the solo life and starting a happy duo!
It had been roughly 720 days since I'd entered the adventurer industry — I finally had a fixed party!
"Raise your glasses in toast!"
I did a joyful kong-dance right in the middle of the garden.
I hummed a tune from the old magistrate stories and shook my whole body.
Because from today onward, I was no longer just 1, I was 2.
I tried expressing my joy with a kong-dance befitting the number.
Bam bam bam bam bam bam bam bam, ba-ra-ba-ra-bam.
Dang dang dang.
Bam bam bam bam bam bam bam bam, ba-ra-ba-ra-bam.
Dang dang dang.
I look forward to working with you, Rebecca, master of the martial fist.