Black Moon's Evolution and a Sweet Date with the Succubus
When the quiet, crystal-clear morning sunlight of the Abyss came pouring gently down over the blue meadow and the cottage's yard, Yushin stood gripping the sheath of Black Moon, which he had quietly drawn from his hip, gazing down at the strange transformation in the blade.
Since its official evolution to E-Rank, Black Moon's appearance had utterly transcended the realm of a mere lump of metal, radiating the arcane mystery of a demon blade.
The blade, smooth and cold as if precision-ground from jet-black obsidian, had grown more than a hand-span longer than before, and the weighty presence of the demonic power coursing through the veins of his palm when he held it meshed with his sense of balance with a precision that could not even be compared to its earlier form.
Along the blade's surface, waves of blue and dark-black demonic energy undulated in soft ripples, like the living veins of a breathing creature.
"They say it ranked up, but from the outside it just looks like a blade that's gotten a little longer and sleeker..."
Murmuring to himself, Yushin gave Black Moon a light swing at the empty air of the yard.
Swish!
There wasn't a single trace of exaggerated recoil or unnecessary grinding of demonic power in the sensation of the blade carving through the air.
What was truly astonishing happened in that instant, the moment the edge swept through empty space.
The blade of Black Moon slid forward on its own, drawing a graceful arc half a beat faster than the point where Yushin had decided to stop its trajectory — as if it had already read its master's thoughts in advance.
It felt eerie and chilling, as though the blade had predicted the next technique flickering through its owner's mind and moved of its own accord.
...I'm not imagining things. This sword is definitely thinking and reacting on its own.
Yushin narrowed his eyes and stared carefully at Black Moon's edge.
A hidden, internal change in a weapon — the emergence of a self. That was the most dangerous double-edged sword of all, one that could steal its master's life on the battlefield, or else grant absolute dominion.
Yushin resolved to test the demon blade's true performance and its concealed danger beyond any doubt.
And the perfect opponent was the most experienced, most seasoned senior demon in this cottage — a Demon King candidate herself.
"Tia."
At Yushin's gentle call, the red-haired vampire princess who had been leaning against the bedroom door yawning blinked her languid eyes and slowly walked out.
Her long crimson hair was still slightly tousled with sleep, but the vampiric sense unique to her kind — the ability to read a man's presence and killing intent — burned bright and sharp.
"What is it, my mate? Even from morning, your voice carries a curious tension in it when you call for me."
"I want to spar with you. No fooling around — seriously, at full strength, like a real fight."
At that single resolute remark, the languor in Tia's crimson eyes evaporated as though it had never been.
Behind the face of the pouting, jealous temptress who sulked in bed, there now stood the sharp, frost-cold spirit of a warrior — the sole heir of House Amelia, the most prestigious family of the demon realm.
"Ohh... so you wish to test that jet-black demon blade of yours?"
Tia rolled her shoulders lightly and walked to the center of the yard.
She was empty-handed, yet there was not a single opening in her footwork or her stance.
"I have no intention whatsoever of holding back. After all, that ominous sword of yours would never suffer a half-baked opponent to wield it — it would swallow them whole instead."
With a sinister scent of blood, the atmospheric pressure across the entire yard dropped and settled into something heavy and oppressive.
Though it wore the form of a friendly spar, this was in truth a perilous trial — a test meant to lay bare the unknown essence dwelling within the sword, its wielder, and their bond.
"Here I come, Tia!"
"Come at me, my man!"
The instant Tia's proud declaration rang out, the pure vampire demonic power slumbering within her body erupted outward in every direction, released like a detonation.
Crackle!
Crimson droplets of blood spewed from her fingertips, congealing grotesquely in midair before transforming in an instant into dozens of sharp spears and blades of blood.
Hemomancy — the supreme secret art of the demon realm.
Shhhwik!
The blood-forged spearheads came shrieking in at a terrifying speed, too fast for the eye to track.
Just as Yushin twisted his body in a reflexive attempt to dodge, the Black Moon in his hand reacted once more — a full beat ahead of its master's will.
Swish!
Before Yushin could even flex his wrist, Black Moon's blade surged upward through the air, and the jet-black dark sword energy wrapped around its edge split the oncoming blood spear clean in two.
Sizzle!
The severed fragments of blood never even touched the ground — they were swallowed without a trace by Black Moon's black demonic aura, scattering like smoke.
But Tia's assault did not end there.
"Don't relax just because you cut down one!"
KUWAAAHM!
At Tia's gesture, hundreds of jagged crimson spikes erupted from the earth on all sides like a colossal wave.
In that moment, Black Moon's blade blazed madly red, wrenching violently against its master's grip.
This was no mere defense or parry — it was a feral, ravening thirst, as though the blade yearned to butcher the female before it without mercy and devour her blood.
'Ghh... how dare this cursed thing try to wrest control from its master?!'
Yushin explosively drew up the C-Rank demonic power in his dantian and clamped down on Black Moon's hilt hard enough to snap it.
Rather than being swept along by the sword's madness, he seized the demon blade's reins firmly with the raw strength of a man's soul and spirit.
"My mate!"
Tia stepped back a single pace and withdrew the energy of her hemomancy.
Deep warning and astonishment were etched into her sharp crimson eyes.
"Did you see that just now? That sword... it is a far more wicked and dangerous thing than I imagined. It moves ahead of your will, seeking to destroy and devour your opponent."
Yushin, breathing hard, looked down at the Black Moon in his hand.
The system entity Yurang-i was still maintaining her silence.
Yushin took a deep breath and slowly ran his palm down the length of the blade.
"It's fine. I'm the only master this thing has. There's no way it will ever devour me."
At the conviction in Yushin's voice, Black Moon's wildly thrashing bloodlust died down as though it had all been a lie, settling meekly into stillness.
The verdict of the spar was, in truth, a veteran's victory for Tia — but a deep smile hung on Yushin's lips.
He hadn't fully tamed the sword yet, but the precious harvest of certainty he'd gained — that they could grow and advance together — was worth more than a win.
"You've tested your sword, so... now it's time to satisfy me in bed, is it not?"
Tia licked her red lips with sultry grace and closed the distance with a captivating gait.
Where the tension of the duel had drained away, the vampire princess's thick, burning heat was rising in full.
Yushin roughly seized Tia's cinched corseted waist and pushed her inside the cottage bedroom.
What followed was a night of hot, furious lovemaking.
Amid the slick, lewd sounds of flesh slapping against flesh, Yushin's massive cock relentlessly pounded Tia's narrow womb, and Tia sank her sharp fangs into the nape of his neck, alternating between feasting on his blood and his seed as she shrieked out in ecstatic climax.
Slap! Smack, smack!
"Aahnn...! Nanggun-nim...! Your cock is so, so hoooot...!"
"Tia, the way you squeeze me is a work of art... I'm cumming!"
Buruuuurk! Pfffwwwt!
When the furious coupling finally subsided with dawn breaking at the edge of the sky, Tia drifted off into a near-faint sleep, her womb filled to the brim with Yushin's thick seed.
And then, the next morning.
"Hmph—! That's so unfair! Last night you two were having all that wild fun without me!"
Standing beside the cottage bed in a thin see-through nightgown, the silver-haired succubus Lilith stood with both her cheeks puffed out as round as a pufferfish.
Her slender devil's tail was slapping against the floor, thwap thwap, as if to announce her anger.
"Why are you pouting the moment you wake up, Lilith?"
"Nanggun-nim, you big dummy! What about me? I was left on standby play all night long!"
"...Where on earth did you even pick up a word like that?"
When Yushin burst out laughing, Lilith glared at him from beneath her lashes and pushed her lips into an exaggerated pout.
"Today you have to dote on me and only me, fair and square! You can promise that, right?!"
At her adorable sulking, Yushin sat up in bed and gently stroked her hair.
"All right, I got it. Today is Lilith's turn, fair and square."
At those words, Lilith's adorable tail froze mid-swing — then began to sway sweetly.
"Really...? You're not lying to me?"
Just then, Tia emerged from the bedroom, immaculately composed despite the early hour, folding her arms with an amused smile.
"Quite the racket, first thing in the morning. Lilith, stop whining so much."
"Tia got Nanggun-nim all to herself yesterday, and now...!"
"Fufu, then I shall gracefully bow out at this point. Yesterday's lingering warmth still suffuses my entire body, after all. In return, my mate — as promised, you are to satisfy that child thoroughly today."
At Tia's gracious, cool-headed concession, Lilith's eyes went perfectly round.
Once the door closed and the two of them were alone, Yushin took Lilith's small hand in his and squeezed it tight.
"Lilith, let's go into town today. Just the two of us — we'll eat delicious things all day and go on a proper date."
"A... a date?! A date with Nanggun-nim, just the two of us?!"
Lilith's silver horns and little bat wings trembled violently with joy.
"Yes! I'll go change into the prettiest dress I own right now! No, wait — Nanggun-nim, you pick it out for me yourself!"
Watching the silver-haired succubus dart back and forth across the room, so excited she hardly knew what to do with herself, Yushin felt the fatigue of the sleepless night melt away like snow under the sun.
Even amid the blood-soaked battles and the demon blade's trial, a peaceful, sweet date in the Abyss with the precious wife he had returned to protect was only just about to begin.