Annihilation of the Vanguard
The vanguard of the Great Demon King's Army's 3rd Legion. A multinational counter-force comprising the Northern Imperial Army, part of the Central Army, and a contingent of the Holy Kingdom's Holy Knights had joined forces. Unlike other legions, they had been the first to set foot in the Demon King's territory, advancing slowly.
"Uwaaaah..."
"Serina. You okay?"
"Yeah... it's just a bit scary..."
"You're a knight, aren't you? Buck up!"
The black-haired futanari, Narin, patted her childhood friend Serina's back with a grin. But even she, who was smiling, had sweat-slicked palms—proof that she was just as scared. A glance around showed the same for everyone else. Even the veteran knights who had survived battles against the Demon King's forces and grown stronger were breaking out in cold sweats.
Unlike the ragtag mob of the Demon King's fodder they had faced before, this place carried an oppressive pressure from the very space itself.
"...This is the real deal."
The Demon King's heartland. A bizarre snow mountain that had existed only briefly had led them here. From this point on, they weren't dealing with mere fodder anymore, but elite troops.
"Let's hang in there, Serina."
"Yeah, Narin. Let's do this."
Serina locked eyes with her childhood friend Narin, steeling her resolve once more.
"Halt! Halt! We're taking a short break here!"
How much farther had they marched? Rest time finally came. As they slumped to the ground to catch their breath, one of Serina's close senior knights approached.
"Tough, huh?"
"Ah, Senior..."
"Heh heh."
The senior let out a small chuckle and scanned the surroundings. Knights and soldiers alike, everyone had cold sweat beading on their foreheads.
"The march itself isn't that bad. We've got reinforcement magic and holy spells, and heavy supplies are in inventories. But... this atmosphere? It's a huge mental burden."
"Yeah, really... my hands are shaking..."
"Get used to it quick. What are we gonna do if even you knights are like this..."
The senior, flashing a bright smile and thumping Serina's back, suddenly cut off mid-sentence and whipped his gaze around. The atmosphere grew heavy in an instant. One by one, knights sensing the anomaly rose and drew their swords.
"Serina."
"Yes, Senior."
Serina drew her sword too and called Narin to her side.
One second, one second dragged on agonizingly slow. That eternity-like tension rapidly drained their focus and mental strength. An instinct that something was there. Not just one person's hunch, but a shared sense cutting across ranks and strength levels. That instinct seemed to slowly gnaw away at the 3rd Legion.
"Stay here for a bit. I'll scout ahead and—!"
Whoosh! A harsh wind slicing through the air.
Crack.
And then, the sound of something bursting.
"Huh?"
Crack. Crackle-crunch. Crunch.
In her narrowing field of vision, what she saw was red fireworks.
A pebble?
It rolled up and bumped her foot—a tiny pebble. A very tiny pebble, smeared with blood, flesh, and muscle fibers.
Red fireworks bursting into the sky. Sometimes heads, arms, torsos exploded. It was spectacular. Dreamlike.
"...Senior."
Only then did Serina look to her side.
"Ah..."
Snap. His head jerked unnaturally fast. She didn't have the courage to look. Even the brief glimpse made her want to vomit.
"Hng? What's this?"
"...Urk."
"Suits my tastes?"

Turning her head, she saw a woman perched atop a massive boulder. Horns sprouting from her head. Fiery red hair like blood, scales covering her body, and a thick tail.
"...A dragon!"
"Haha! Little one. Leave the kid next to you and go. I won't kill you then?"
"...Narin! Stick right by me!"
"Her name's Narin, huh! Aaaah! What a pretty name!!"
Boom!
The red dragon in human form charged straight at Serina.
Bam! Bam! Bam!
Slow yet fast, an uncanny claw swipe. The dragon's talons clashed repeatedly with Serina's sword. The dragon's attacks were slow—slow enough for even a child to track with their eyes. Yet somehow, the instinct that a split-second delay would tear her to shreds crawled up her spine.
Dragon claws and talons were said to be incredibly tough and sharp, leaving massive scars on the continent. Some myths claimed the canyons dotting the land were dragon claw marks.
"Grk!"
Those thick, hard dragon talons began gnawing at Serina's sword.
"Holding up well?"
"Gaaah!"
"Hng. Up close, you're pretty appealing too."
As she pressed Serina, the red dragon bellowed skyward.
"These two are MINE! Touch them and you're dead!!"
Boom!!!
A follow-up kick. It struck Serina's abdomen dead-on, sending her body flying far off. The horrific sounds of her tumbling across the ground, crashing through branches and bushes. Yet somehow, nothing broke or tore.
The red dragon, with her keen hearing, confirmed this and grinned ear-to-ear.
"Aha. Magic? Or holy arts? Either way, fine by me. Means I can get even rougher!"
She bounced like a child, drool dripping, as she scraped her cheek scales with sharp nails, staring in the direction Serina had flown. Then she slowly turned her head.
"But first."
Toward Narin, who stared at the red dragon with trembling eyes, sword in hand.
"Time for the main course. Dessert comes after♥"
The red dragon stepped forward.
⁎ ⁎ ⁎
Her head spun. Her whole body throbbed with pain.
"...What."
Her vision slowly focused. Clutching her dizzy head, she looked around.
"How far did I fly...?"
What she saw was ruins. Or more precisely, a ruined village. Crumbled walls and houses, the stench of rot wafting everywhere. Gut-wrenching sights littered the area.
"...Narin!"
"That kid's dead."
"...!"
Loose hair. Blue eyes. Sharp scales and claws. A vertically slit pupil gleaming as the blue dragon approached slowly. And above her, four more dragons unfolding massive wings.
"W-What are you...?"

The blue dragon flashed a thick smile at Serina's fear-laden question and tossed the head in her hand.
Thud. Roll.
The head rolled right up to her. Serina instantly knew whose it was.
"...Vice Captain!"
"Ah, was that guy the vice captain? Heh heh. Figures. He was strong."
Sword Expert, one step below Sword Master—and top-tier at that. Her vice captain.
No wounds.
They said people got eerily calm when pushed to the brink. Her mind, coldly rational even to herself, rapidly gathered info from the vice captain's head. No small cuts, no scratches. At most ten exchanges, probably fewer, and it was over.
"...What about Narin...?"
"Who knows. Probably dead? Boss has her marked."
"..."
"Don't look at me like that. I'll send you to join her soon enough."
Serina glared at the blue dragon with ice-cold eyes. The dragon met that chilling gaze with a deep smile, slowly approaching while licking her lips with a long tongue.
"Ahh. Gonna get chewed out by the boss."
The blue dragon grinned darkly, stroking Serina's cheek.
"Guess I'll take your seed? Dildo-bitch."
⁎ ⁎ ⁎
"A-ahhh..."
Narin dropped her sword. She was terrified. Seniors, friends, comrades, superiors—all dead.
"That was fun."
Thud. The legion commander's head fell.
His torso was shredded beyond recognition. Nausea surged.
"Now then. With the pests gone... time to claim the spoils."
"Kehk...!"
Bam— In an instant, the red dragon closed in, grabbed Narin's throat, and pinned her to the ground.
"Hnguut... Ahh. Nice."
Forcing Narin's cock erect, she swallowed it whole in one go. The dragon's pussy ground and clenched around Narin's cock like it was chewing it up. No pleasure—just the overwhelming terror of death dwarfing any ecstasy.
"A-aaaah! Aaaah!"
Crunch.
Tears and snot streaming in terror, Narin snatched up her fallen sword. The thrust practiced hundreds, thousands, tens of thousands of times. With that simple motion, she jammed the chipped, dulled blade into the red dragon's neck.
"...Fun."
Drip. Crackle.
Red blood trickled from the dragon's neck. The sword shattered completely, but she'd drawn blood from the monstrous beast.

"In ten years—no, maybe five—you'd have been a Sword Master!"
The dragon was impressed. Impressed by the talent of this girl named Narin before her. She'd taken a liking purely for taste and apparent strength, but hadn't expected this level of potential.
Thus, ecstasy surged through her.
"Ahh. Perfect."
Gripping Narin's throat hard, she began milking the cock.
"Don't worry. Your genius genes will definitely pass to my kids."
A dragon like herself and this girl's talent. What if they mixed in a child? Dragons were already a scarce race. Not due to low libido or abysmal conception rates. They were innately all-female, and their high racial prestige meant they didn't conceive from mediocre genes. Unless at least one side had exceptional talent, it was just a dildo.
"Bliss."
Having found a mate she'd long dreamed of, the red dragon smiled happily.
And crunch.
Narin's vision went black.
⁎ ⁎ ⁎
Soon after, the Empire's scouts arrived at the scene, and their report reached the emperor.
Great Demon King's Army 3rd Legion. All personnel deceased except for one missing.