Harem Startup : The Demon Billionaire is on Vacation

With a flash of heat and darkness, Amare dropped into his left hand, humming with Lust's energy—sharp, intoxicating, wicked.

Then the world tilted into motion.

Lux moved.

And the room changed.

He launched himself into the fray, boots cracking tile, shadow flaring beneath his steps as his Agility skill triggered in full engagement, pulling his body in flashes of smoke and streaks of red light.

The first rat lunged.

Lux ducked under its swipe, twirled Devorare and drove it up through the beast's jaw, the Greed Blade whispering softly in infernal tongue as it ate the soul right from the spine.

[CRITICAL HIT !]

[Temporary Buff Gained: Demon's Dividend – +10% Speed, +Mana Regeneration]

He ripped it free, turned mid-spin, and caught the second one across the gut with Amare. The Lust Blade cut like silk—clean, quick, elegant. Its body fell apart before it even landed.

The third one shrieked—climbing along the ceiling—and pounced.

Lux flung a hand upward.

"Demonic Orbs!" he casted.

Dozens of shadowy spheres burst into existence—black marbles glowing faintly purple, all circling his shoulders in elegant orbit.

He pointed.

Three slammed into the demon mid-air—one exploded in its chest, one latched with a curse and screamed a debt it could not pay, and the third ricocheted like a possessed pinball straight into its eye socket.

-Boom! Shriek! Pop!

The rat collapsed in midair, twitching and melting.

Lux exhaled.

But the rats didn't stop.

Of course they didn't.

They never stopped.

Six more skittered in from all angles—walls, windows, vents. They chattered in a tongue that wasn't demonic or human, just rage and filth and debt given shape.

"Greedy little bastards," Lux muttered. "Abyssal Grasp!" He used his skills.

The ground beneath them cracked.

Shadows howled.

Tendrils of black, writhing void erupted like a broken ribcage across the floor—slamming upward, piercing through demon torsos, snapping bones like branches. One tail-wrapped rat screeched as it was pulled downward, crushed slowly, dragged screaming back into the pit between worlds.

The room pulsed with ambient Terror.

[Status Effect Applied: Terror]

[Four enemies staggered. Two immobilized.]

And still—

They came.

More claws. More teeth. More hunger.

Lux kept fighting. Moving. Dancing between the slaughter. His blades sang through the air, black and red, passion and price incarnate.

But he couldn't stop glancing behind him.

Because Mira was still standing at the table.

Still unmoved.

Still watching.

Not panicking.

Not flailing.

Just… analyzing.

He caught her expression once in a blur of motion.

Calculating.

Her eyes darted across the room like a strategist watching the edges of a war game. She tracked the trajectory of his blades. Counted enemies. Watched his movements like she was building a model of him in her mind.

She wasn't scared.

She was studying.

And that?

That worried him more than the rats.

"Damn it," Lux muttered, leaping into the air and flipping over two incoming tails, dragging both daggers in a cruel cross as he fell splattering blood across the silk screens.

[Kill Confirmed – Remaining Hostiles: 7]

He landed, breath sharp.

And then—a screech.

Too close.

His head snapped to the side.

One of them had slipped through.

Behind him.

Charging right for Mira. While his barrier had vanished.

She didn't move.

Still standing.

Still calculating.

Too slow.

Lux hissed. "Shit—!"

He raised his hand, Barrier spell already charging—dark light curling around his palm.

But it wasn't fast enough.

The rat-demon was already mid-leap.

Too close.

Too fast.

He was about to shout, about to throw himself toward her—

—and then Mira moved.

Not like a noble.

Not like a dragon princess.

She kicked the damn thing.

High heel first.

Right into its face.

The crunch was satisfying.

So was the thump as it hit the koi pond barrier and crumpled, twitching.

Lux froze.

Mouth open.

The rat lay dazed on the floor, muzzle caved in, fangs scattered like coins.

Mira lowered her leg slowly. Her face completely blank.

Then she straightened her cheongsam sleeve.

"Don't make me repeat myself," she said to the demon's corpse. "Get lost."

And Lux?

He just stood there.

In the middle of a blood-soaked, half-collapsed restaurant inside a pocket dimension hell trap—

Staring at her like she'd just solved all of quantum finance in a cocktail dress.

"…I take it back," he said hoarsely.

She arched a brow. "Take what back?"

"You're not just a mortal," he whispered.

"You're incredible."

Mira rolled her eyes, but the color rising in her cheeks betrayed her. Just a flicker. A faint shade of pink along her cheekbones that she definitely didn't want him to see.

"I'm a dragon," she muttered under her breath. "Dragons don't stay still."

Then she did something that made Lux—someone who regularly dined with wrath demons and had assassination attempts as light cardio—actually pause.

She reached down to her thigh, where the high slit of her cheongsam opened just enough to reveal a hidden holster—two sleek black cases, each no bigger than a phone. In one smooth, practiced motion, she swept them out, snapped them open mid-spin, and suddenly she was holding a pair of tongfas.

Not wooden.

Not steel.

Mana-forged tongfas. Elegant and deadly. Each glowed faintly with emerald inscriptions, humming with embedded enchantments. Enchanted pulse cores, rotating conduits. Eastern craft.

They weren't showpieces.

They were weapons.

Lux's mouth opened. "Wait—are those—?"

The half-dead rat demon behind her stirred, twitching with a broken jaw and cracked skull.

Mira didn't even blink.

She lifted one tongfa, aimed the hollowed tip at the rat's face, and—

-BANG!

A focused mana shot burst from the core and punched straight through the demon's skull. Black blood sprayed across the koi-glass floor as the demon collapsed for good this time, twitching once before going still.

Lux blinked.

Hard.

"Did you just…"

"Yeah." She spun the tongfas like a show-off—like she wasn't wearing a damn formal gown and heels. "I killed a demon."

"You had guns in your thighs."

"They're not guns," she said flatly. "They're hybrid-cast mana-conductors. And yes, you're welcome."