Harem Startup : The Demon Billionaire is on Vacation

Chapter 612 – Wanna Test How Far The Stamina Bar Goes?

He turned to her, slow, deliberate. His smile warm, but touched with something new. Something darker.

Still him.

But not just him.

And somewhere down the hallway...

Rava blinked from her datapad, suddenly unsettled.

Naomi, mid-coffee sip, paused, heart skipping.

And Lullaby, half-asleep on the couch, stirred like someone had whispered her name in a dream.

They felt it.

Every girl with a bond to Lux felt the ripple.

Like magic.

Like arousal.

Like a low-frequency summoning.

None of them said anything.

They just started walking.

Back in Lux’s room, the air shimmered faintly.

The gold-lined windows dimmed like the realm itself was holding its breath.

Sira and Mira were already inside, frozen.

Mira usually so smug and dominant, stood still, her lips parted, eyes locked onto Lux as if unsure whether to bow or bite him.

Lux’s aura was burning softly around him. Not visible like fire. But real.

Like gravity.

Hellfire heat wrapped in charm and gold.

The room felt smaller.

The door clicked open.

Rava entered first, her tentacles twitching unconsciously, eyes narrowed.

”What did you do?” she asked quietly.

Naomi followed behind, expression unreadable, but her pupils were dilated, breath just a bit too quick.

Then came Lullaby, barefoot, pillow still in her hands, blinking slowly like the dream hadn’t ended yet.

And lastly... Ely.

They saw him.

Lux turned.

He was shirtless, of course.

Naked even. But he was in his demonic form.

”Yeah?” Lux said, voice like honey and hellfire, eyes locking with Sira’s.

”You feel different,” she breathed, trying not to shiver.

Lux looked down at his hands. They pulsed with residual mana. Something new. Something telekinetic. A breakthrough.

His fingers curled and flexed once, feeling the echo of it.

”Yeah,” he murmured. ”I think I finally upgraded out of ’prince’ mode.”

He looked up.

Eyes blazing.

Smile wicked.

”So...”

He didn’t even need to finish.

They all felt the offer.

The heat.

The promise.

”Wanna test how far the stamina bar goes?”

Mira inhaled sharply.

She should’ve said no.

She knew she should’ve.

But her lips curled anyway. Slowly. Sensually.

”...Close the door first.”

Lux laughed.

And he responded.

The lights flickered. The floor buzzed softly.

[System Alert: ]

[Incubus Pheromone Emission: Enhanced]

[Stamina Bar Limit: Overflow Mode Active.]

[Warning: Risk of Multiple Girl Collapse – HIGH]

”Oh hell no,” Naomi muttered, stepping back instinctively. ”What did you unlock?!”

”Did you fuse with a Lust dragon?!” Mira snapped, cheeks flushed.

”I thought I was dreaming,” Lullaby whispered, eyes still half-lidded. ”But this feels better...”

Rava crossed her arms, her voice sharp, but low, hoarse, like her throat was already dry.

”You know you’re not allowed to use that tone unless you’re planning to finish the job.”

Lux just raised an eyebrow.

”No refunds.”

Then his hand lifted, slowly.

With no contact, Ely’s skirt shifted an inch lower.

Telekinesis.

”Lux—!” she gasped, grabbing it.

Rava’s tentacles twitched.

Naomi stepped forward like a brave soldier.

Lullaby just padded to the bed and sat down like a cat waiting to be fed.

And Lux?

He cracked his neck. ”Well then,” he purred. ”Let’s test my endurance.”

And the door slammed shut behind them. On its own.

This time, no one questioned it.

The room answered first.

Not with sound, but with pressure. Lux’s aura surged, thick and intoxicating, curling through the air like velvet smoke.

His incubus pheromones spiked instantly, sweet and dangerous, a pulse that slid straight under skin and into breath. Knees softened. Heat bloomed. Every bond in the room lit up at once.

Rava grabbed him by the hair and kissed him hard, salt and hunger and teeth.

Lux groaned and dragged her closer, the sound tearing out of him as Mira’s hands followed... confident, claiming... palms sliding over his shoulders, nails scraping just enough to make his wings twitch.

Sira didn’t rush. She never did. She stepped in slow, fingers tracing his collarbone like she was marking territory, lips finding his neck with deliberate pressure. A bite. Not gentle. Lux hissed, head tipping back as Naomi’s hands steadied him from behind, grounding and warm even as her breath hitched.

Lullaby climbed onto the bed and pressed against his side, humming softly, dream-sweet magic brushing his nerves like silk.

Ely hovered for a heartbeat, then courage won. She kissed his shoulder, then lower, fingers trembling as she explored the heat of him.

Lux groaned again, deeper this time, burying his face between warmth and softness, breath breaking between breasts as laughter and moans tangled together. He yanked them closer, not caring who ended up where, only that no space remained.

Someone’s tongue traced his core, slow and teasing, and his entire body jolted. Another mouth found his neck again, biting harder this time, while teeth grazed his earlobe just enough to make him swear under his breath. Fingers slid along his tail, followed by a playful lick that made his wings flare wide. Someone else dared to trace the curve of his horns, lips brushing there like a challenge.

He lost track of who was where.

He didn’t need to know.

The chaos was perfect.

Lux came undone in waves, one rolling over him, leaving him breathless and laughing, only for hands to pull him back into the storm before he could even think about stopping.

One round.

And two.

Then three.

And he didn’t remember it.

Round after round, the heat kept building, his body responding greedily, eagerly, like restraint had never existed.

He groaned, breath hitching between kisses and touches.

Rava laughed against his skin.

Mira whispered something smug and sinful.

Sira’s grip tightened like a promise she intended to collect.

Naomi murmured his name like an anchor.

Lullaby’s hum deepened, satisfied and dreamy.

Ely gasped softly, eyes bright.

Lux threw his head back, laughter breaking into another hoarse groan, the sound raw and unguarded. His pheromones flooded the room, thick enough to taste, the air humming with shared breath and heat and trust.

He dominated completely.

Not because he had to.

But because he could.

Yeah.

The stamina bar wasn’t a joke.

And neither were they.