The Vessel of the Demon King and the First Coupling
From the deepest reaches of his dantian, a searing heat like molten lava spread outward, washing through his entire body.
Mana crystallization.
At first he'd assumed it was nothing more than a horrifying agony, a terrible drain siphoning away the energy within his body — but beneath that flesh-scraping pain, he could feel the dried-up vessels and nerves across his whole frame awakening one by one with a vivid, living pulse.
"Kghh...! What is this power...?"
The air churned heavily, and the blue grass blanketing the ground rippled like a great wave.
It was as if the vast expanse of the Abyss itself was bearing down on him, roughly testing his flesh as a prospective new sovereign.
[ Master, the latent mana within your body is rapidly awakening. ]
"Mana awakening...?"
As Yushin gasped for breath and snapped his eyes open, his vision flooded with blue light, and the immense current of energy coursing through his body carried all the way down to his fingertips.
Beside him, Lilith — who had gone pale as death — seized his hand and yanked it toward her, pressing it between her voluptuous breasts.
"Nanggun-nim...! Are you coming back to us? Are you all right?"
"Mmgh... I'm fine. But something inside my body is completely turning over."
[ The subject possesses no base mana to crystallize. Forcing absorption of ambient mana from the environment to induce flowering of an innate mana circuit. ]
At Yurang-i's matter-of-fact voice, Yushin swallowed a dry breath and let out a hollow laugh.
"So in the end... you're telling me I'm getting mana? Is this that grand plan of yours?"
[ Precisely correct. To be candid, I withheld advance notice lest it dull the thrill of achievement. I humbly ask for your generous forgiveness. ]
"Ha, you little... So you've got me dancing on the palm of your hand while calling it support. Still... not bad."
Yushin gently squeezed Lilith's hand.
When he buried his face between the swell of her bust and panted there, the feel of her soft, pliant flesh and the sweet musk of her skin scrambled his brain.
"Outstanding first aid, Lilith..."
"Eh? Oh...? It was nothing at all, Nanggun-nim..."
Lilith flushed to her ears and smiled bashfully.
In that very instant, the system window hanging in the air blazed into brilliant gold.
"Nanggun-nim...! Good heavens, a noble and profound mana just like the Demon King's own is pouring out of your body...!"
Lilith cried out in a voice trembling between shock and rapture.
Clutching his thundering heart, Yushin murmured in a shaking voice.
"Status window...!"
Mana — F.
The number was nothing but a starting point, yet seeing the letter proudly occupying the mana slot that had stood empty ever since his hunter awakening filled Yushin's chest with swelling pride.
The newly awakened mana entwined with the bloodline of the Heavenly Demon beneath his skin, radiating an ecstasy on the verge of bursting.
In that moment, Lilith's violet eyes gazing down at him gleamed with an uncontrollable, sticky hunger.
"Nanggun-nim..."
Her slender fingers traced across his chest, sliding slowly downward.
"This hot mana pouring out of your body... I want it to fill me up inside. Please drench me in it..."
"You want me to fill you with mana? How exactly am I supposed to do that?"
Lilith curled her lips into a seductive smile and slid her hand down between the narrow gap of her thighs beneath the sheer bodysuit.
"Naturally... you must pour your hot seed deep, deep inside my pussy. I'm a succubus who exists for you and you alone, Nanggun-nim..."
Snick.
Lilith pushed aside the thin lace of her lingerie herself.
Between her hidden petals, clear nectar dripped down like honey, dampening the blades of grass.
It was the mound of a virginal girl who had never once in her life taken a male — yet the instinct of a succubus quivered and gaped, starving for the master before her eyes.
Inside Yushin's trousers, the massive slab of flesh pulsed with the waves of mana and surged ferociously erect.
"It's your first time... don't cry even if it hurts."
"Nnheh... even if it tears me apart, if it's you, Nanggun-nim... please take all of my first...!"
Thrust!
"Aaahngh...!"
On the wet grass, Yushin's monstrous cock drove mercilessly through Lilith's tight, clinging virgin pussy.
At the thick, invasive pressure splitting her innocence open, Lilith's back arched like a drawn bow.
Crimson maiden's blood mingled with her clear nectar and trickled down her honeyed thighs — but before she could even register the pain, the uniquely demonic, vicious pleasure shook her brain to its core.
"Haaah, Nanggun-nim...! Your cock is so thick and hot...!"
The walls of her channel clamped down around him without a single gap, sucking and squeezing at his cock.
Every time that wrist-thick shaft ground through her delicate, yielding walls, silver saliva streamed from between Lilith's lips.
Slap! Squelch!
In the cool open air, the lewd wet sound of flesh striking flesh filled the forest.
Yushin gripped her hips firm and steady, fighting to keep his reason, and began driving into her with heavy, deliberate strokes.
With every thrust, the crown of his cock pounded against the mouth of her womb, and each time, Lilith's eyes rolled back and her whole body shuddered.
"Hnngh...! It's good, so good, Nanggun-nim...! My pussy is melting around your cock...!"
True to her race's dominion over lust, Lilith convulsed her womb ceaselessly, swallowing his cock whole again and again.
Her nectar erupted like a fountain, soaking Yushin's thighs and sac until they glistened.
"Hnn... hoo..."
Yushin suppressed the climax swelling to the very tip of his spine and buried himself to the hilt.
But Lilith, already wrung through dozens of orgasms, had long since surpassed the limits of pleasure, dissolving into a helpless, infantile ruin.
"Nngh... wan' more, sho good... Nanggun-nim's mana-rich milk... put lots and lots inside my pusheee...!"
Begging in that regressed baby voice while squeezing him with her hips, her grip was nothing short of lethal.
He could hold back no longer.
Yushin spread her plump thighs wide and hooked them over his shoulders, shoved his cock in to the very root, and clamped his glans tight against the mouth of her womb.
"Kgh... I'm coming, Lilith...!"
Spurt-spurt-spurt! Psshhh!
"Hiiiyaaaahh...!"
Thick, scorching ropes of semen blasted deep into Lilith's womb without pause.
Under the endless, immense volume of his release, her hips were flung up off the ground.
Her eyes had rolled completely white, and only broken, winded gasps spilled from her throat.
Between her trembling thighs, Yushin's dense, milky fluid overflowed and stained the grass white.
[ The Vessel of the Demon King has fully settled. ]
[ Dense coupling and insemination with your first dimensional female: complete. ]
[ Reward: Charm stat rises to E-Rank. ]
Only after that prolonged, violent climax did Yushin slowly gather his breath and draw away.
Lilith smiled with a face lost in bliss, nuzzling her cheek against his leg, and soon collapsed into exhausted, deep sleep, her breath coming in colored sighs.
Yushin brushed the sweat-damp silver hair from her brow, offered his knee as her pillow, and let her rest.
[ Congratulations, Master. For a first experience, that was a remarkably audacious outdoor liaison. ]
"You definitely have a female gender, don't you? Why is your speech so twisted up?"
[ The System is genderless, but if pressed, it is closer to a feminine-personality construct tailored to Master's tastes. ]
Leaving his brief exchange with Yurang-i behind, Yushin too closed his eyes against the crashing fatigue.
How much time had passed?
When a sweet floral scent tickled his nose and he opened his eyes, Lilith had already awakened and was gazing down at him, cradling his forehead softly against her voluptuous breasts.
"Oh my, Nanggun-nim... you're awake?"
The sensual, mature allure blooming across her whole body made it impossible to believe she had given her maidenhood mere hours ago.
"How's your body feeling, Lilith?"
"You loved me so much I feel like I'm floating, Nanggun-nim. Come, let's hurry home...!"
The cottage at the village's edge, reached under Lilith's guidance, was cozy and immaculately kept.
"You live alone?"
"Yes. Once we succubi come of age, we strike out on our own to find the Nanggun-nim we'll spend an eternity with."
Yushin asked with a trace of suspicion.
"Aren't succubae a vicious race that drains a man's vitality until he withers and dies?"
Lilith shook her head with a bright peal of laughter.
"That's something only the greedy high nobles with surnames do. We powerless commoner succubae love one single Nanggun-nim for our entire lives, filling each other in return."
At that pure confession, even the last flicker of wariness lingering in Yushin's heart melted away like snow.
"When I become the Demon King of this place, I'll take you back to my world. I swear it."
At those words, Lilith's violet eyes lit up brilliantly.
"Really? I'll work so hard to support you...!"
Watching her gaze slyly drift down toward his crotch, Yushin gave a wry smile and flicked her lightly on the forehead.
Deep in the night, after their meal was finished and Lilith had gone to bed, Yushin stepped out into the yard, folded himself into a cross-legged position, and savored the mana pooled in his dantian.
[ Master's current mana absorption method is highly commendable. In live combat, however, a faster and more efficient approach is recommended. ]
"And what other method would that be?"
[ For male-bodied enemies: strangle the throat and destroy the dantian to forcibly seize their mana. ]
[ For female-bodied enemies: likewise subdue the throat, then steal a kiss — absorbing their mana through saliva and breath. ]
"Why is the method different for men and women?"
[ Because kissing a male-bodied target would put Master in an exceedingly foul mood. ]
At Yurang-i's flat, unhesitating answer, Yushin burst out laughing.
"Then how am I supposed to gather mana without physical contact?"
[ Visually tease female-bodied targets with a lecherous gaze. Your mana circuit responds in proportion to Master's arousal. ]
"...Are you seriously a pervert of a system?"
Gazing at the empty air with frost-chilled eyes, Yushin settled in to face the long night ahead — the night that would carry him toward conquering dimensions and claiming a demon king's throne.