Succubus and the Yin-Mark
"Hwaah... ah... ah..."
The bed... so soft...
"It's a dream... a dream... all of it... just a dream..."
That's right. I just woke up in my own bed, in my own room.
Everything that just happened was nothing but a dream.
Being captured by Gehenna. Having a cock shoved into my face by a woman I'd never seen before. Getting soaked in piss instead of love juices because that cock wouldn't fit. Being lifted up like an onahole and fucked raw. Being tossed into a trash can like a used condom. And having my first kiss stolen by a thick, throbbing dick.
"All of it... a dream..."
"It couldn't possibly be a dream. Unfortunately, this is reality. Denying what has already happened is rather inefficient, don't you think?"
"Hiiieek! Y-you startled me..."
A magical girl jumping at the mere sight of a monster. That, too, was all because of the brutal sex from moments ago.
"Where is this? It looks like some kind of laboratory..."
A place where the ceiling, the floor, and every wall were pure white, littered with beakers of mysterious pink liquid bubbling away and all manner of bizarre machinery.
She was lying on a snow-white hospital bed, dressed in a white patient's gown. The absence of any filthy smell suggested someone had washed her while she was out cold.
And the woman standing beside her, looking down at her face, was none other than the monster Gracia had called her Chief Technologist.
A woman in a white lab coat over a dress shirt and formal skirt, black hair cascading to her shoulders like the night itself. Curiosity glittered in her yellow-brown eyes.
"Correct. Shall I introduce myself first? I am Elia, an executive of Gehenna. Under our revered Demon King Gracia, I hold the rather excessive title of Chief Technologist. His Majesty simply calls me Technologist. And as you can see, this is my laboratory."
"Chief... Technologist...?"
"Translated into Earth terminology... scientist or professor would be the closest equivalents."
So that means every grotesque weapon and magical device those monsters use was made by this bitch.
"I brought you here after you fainted from your rough congress with His Majesty. It must have been quite taxing. You slept for several hours without so much as twitching."
"W-what are you planning to do, dragging me into a lab?"
"Calm yourself. I'll explain everything in due course — including that."
So something is definitely going to happen... Still, at least it won't be the same rough, violent sex as before. Small mercies.
...No. I can't let myself feel relieved over something like that. "As long as I'm not getting fucked, I'm fine"? That just sounds like I'll accept anything short of getting my pussy wrecked.
Remember, Hermes. Your goal is to escape Gehenna. Don't you dare forget that.
"Are you thirsty?"
Elia poured a cup of water from a dispenser and held it out.
A clear glass of water. Come to think of it, her throat was raw from screaming nothing but moans during the sex.
But this was the heart of enemy territory... and in her thoroughly weakened state, drinking water offered by an enemy executive felt a little...
"Worried I might have laced it with some chemical? This is my laboratory, and with your magic wand confiscated, you're no different from an average adult woman right now. If I needed to inject you with anything, I would have finished long before you woke up."
"......"
"You may drink it with confidence. It's dihydrogen monoxide containing trace organic and inorganic matter, disinfection byproducts, aesthetic substances, and microorganisms. Ninety-nine percent probability of being harmless to the human body."
She still wasn't entirely convinced, but her throat was desperately dry.
She gulped down the ice-cold water until her teeth ached.
Elia had been right. Without her magic wand, she couldn't cast a single spell — she was no different from a civilian.
First, gather information here. Then somehow find the wand and escape.
Escape. If I can just escape... I can go home.
"Then allow me to explain."
Elia pressed a remote, and a large whiteboard descended from the ceiling.
"His Majesty Gracia, the ruler of Gehenna. There are many reasons His Majesty invades various dimensions, but the most important of all is the search for a cock-warming case."
"A c—"
She was so flustered the words wouldn't come out.
"D-do you really have to put it that way? Does Gehenna run some kind of campaign to turn perfectly normal words into vulgar garbage or what?"
"What's wrong with 'cock-warming case'? It's not even inaccurate. Well, to match the cultural standards of someone from Earth, 'partner' or 'wife' would be the appropriate substitutions."
I was wrong about her. She washed off the sticky sweat and piss, put me in a soft bed with clean clothes — I thought maybe we could actually communicate.
Calling a person a cock-warming case... Yeah. This bitch is a monster through and through.
She was the one who prepared the trash can I got dumped in, too.
"Finding an excellent cock-war— pardon me, an excellent female capable of bearing His Majesty's child is Gehenna's highest priority. To locate females of suitable aptitude, we dispatched numerous monsters to Earth for testing. As expected, we discovered a great many promising specimens — and you, Hermes, are one of them. That is why we invited you to Gehenna."
"Invited? Invited? You mean kidnapped, you idiot?"
"I will concede that interpretive discrepancies arising from cultural relativism may exist."
"...What the hell does that even mean? So you're... sorry...?"
"Heheh. No. Nothing of the sort. Back to the matter at hand. You were presented to His Majesty, and as expected — no, far beyond expectations — the compatibility was excellent. His Majesty has selected you as a wife candidate."
"A wife candidate... Can I refuse that?"
"The consent of a wife candidate is not a consideration. In Gehenna, His Majesty's word is absolute. Not a single one of the wife candidates currently residing in Gehenna consented either. And yet, later on... they all begged to be made his wife."
Elia licked her crimson lips.
Beyond those eyes staring into empty air, Hermes could almost see the other wife candidates — women just like herself.
A significant number of the missing magical girls were surely among them. Not only from Earth, but women from other worlds as well.
Imagining the misery and suffering of countless wife candidates, Elia seemed to feel a surge of pleasure; her hips gave a little shudder.
"However, there are problems. Due to the species difference between His Majesty — a scion of entropy — and humans, conception is difficult. And even if conception somehow occurs, a mere human body could never withstand carrying His Majesty's offspring. Those two issues are currently the obstacles."
"So basically, my getting pregnant is the problem? Great. Humans can't bear the Demon King's kids, so just let me go. Problem solved."
"That won't do. His Majesty's lineage is a matter of critical importance to us. It would be simpler to find and bring back a more suitable species, but His Majesty prefers human females like yourself. Finding a solution is my job. Don't worry — there's a simple method."
Elia pointed a finger at her.
"We turn you into a succubus."
"A succubus...? The succubus I know?"
The kind that drains a man's vital essence?
"It seems Earth has similar legends. Yes, exactly. Humans as a species are inherently frail, but by mobilizing the full extent of Gehenna's technology, we can transform one into a succubus. Then, by stacking modification upon modification until she becomes a trash-tier livestock breeding-pussy succubus optimized solely for mating, pregnancy, and childbirth — our calculations show she can just barely manage to conceive."
Mating, pregnancy, childbirth-optimized trash breeding-pussy succubus.
I've never heard a single sentence where not one word was good for me.
Of course this bitch is a piece of shit too...!
Seeing the grave look on her face, Elia — in what passed for concern — added a further explanation.
"Even with the modifications, it won't hurt. It will feel good, if anything. Surgical methods involving knives? Why would we use such outdated techniques? The Yin-Mark handles everything."
"Th-the Yin-Mark...?"
"It's a cutting-edge modification method I developed. We inscribe a Yin-Mark on a human female's lower abdomen, and she simply absorbs a male's semen to capacity. The Yin-Mark reacts with the magical energy in the semen and remodels the human body into a succubus. Convenient and efficient."
"Semen?"
Absorb a male's semen to capacity.
I didn't think there could be words more repulsive than "mating-pregnancy-childbirth-optimized trash breeding-pussy succubus."
"Frankly, if we were optimizing purely for efficiency, the most effective method would be to amputate all four limbs as useless dead weight and force-feed semen into every orifice like a foie gras goose..."
"H-hiiiiiieek...!"
Scary, so scaryyyyy...!
She scrambled backward across the bed without thinking. Her back hit the hard wall.
Elia was a monster too. A different breed of monster from Gracia or Galea.
"Don't worry. His Majesty opposed that method. It's inefficient, but His Majesty funds everything — and a client's requirements take priority over efficiency for any Technologist."
H-His Majesty opposed it?
Gracia... that incomprehensible being actually said no?
Stopping a limb-amputating, semen-pickling succubus conversion... She almost felt grateful to Gracia — the same Gracia who had taken her virginity and her first cock-kiss on their first meeting.
"We convert captured females into succubi. Then, if His Majesty takes a liking to one, he freely fucks her premium, springy pussy — thoroughly marinated in male semen over a long period — and impregnates her. Simple, isn't it?"
"You're insane. All of you are insane. Every last one of you is a bastard who deserves to burn in hell."
"Hmm... Well then... In accordance with bioethics protocols for living-subject research, the researcher is required to provide a full prior explanation to the intelligent research subject. So — will you consent to the succubus modification experiment?"
"Would you consent, you psycho?! Shut the hell up! What kind of crazy bitch would agree to an experiment like that?!"
She bolted upright from the bed and sprinted for the exit!
The original plan was to gather information slowly and then escape, but I've changed my mind.
I have to run before I become a trash livestock breeding-pussy succubus for mating, pregnancy, and childbirth!
Elia doesn't seem like a combatant. If I can just get out of the lab, find my magic wand somehow, and get back to Earth...!
"Haa... Stop."
"Gueh!"
Thud-crash! At a single word from Elia, both of Hermes's legs locked rigid and she toppled straight over.
"Wh-wha— what? M-my legs won't move? You did put something in that water! You lied to me!"
"Haa... Why must everything be so inefficient. I never lied to you. Lying is inefficient. That water was ordinary water. Compositionally identical to Earth's tap water."
"Th-then why won't my legs move?!"
Elia walked over and crouched in front of the fallen Hermes. Through her coffee-colored stockings, a flash of white fabric was visible.
"I already told you. If I needed to inject anything, I would have finished before you woke up♡"
Then... that means... it was already done... before I even woke up...?
"Eh...? C-consent... what about consent? Why did you even ask...?"
"Bioethics protocols for non-demon-realm intelligent subjects mandate explanation only. Written consent is not a consideration. Efficient, isn't it?"
The tip of Elia's finger pressed firmly against Hermes's womb.
"Hwiiiieek...!"
A crackling, electric sensation started in her womb, raced up her spine, and flooded into her brain.
Her hips rocked forward and back of their own accord, like a monkey in heat♡
Her pussy writhed on its own, desperate to relieve a pleasure she couldn't even name♡
"Ohok♡ Ooh♡ Oaaaaah♡"
Ah♡ There it is♡ Right above my womb♡ Right above a woman's most precious, sacred space♡
The Yin-Mark that's going to turn me into a trash breeding-pussy succubus♡
Even through the white patient's gown, the Yin-Mark glowed with an obscenely lewd pink light, begging — Fuck me please♡ Fuck me please♡ — as it pleaded for cock♡
"Say hello. This is the Yin-Mark that will transform you into a mating-pregnancy-childbirth-optimized trash breeding-pussy succubus and His Majesty's wife... pardon me. His Majesty's cock-warming case♡"