Harem Startup : The Demon Billionaire is on Vacation

Chapter 386 – Mortal Lineages

Lux Vaelthorn in his unbothered element.

He stepped out into the hall—scent of Naomi still clinging to him like victory cologne.

And—of course—Sira was waiting.

Leaning against the wall just outside his room, arms crossed, one brow raised like the Pride sin she was born to be.

”Took your time,” she said, falling into step beside him with that slow, sensual strut that made even the carpet want to compliment her.

Lux didn’t miss a beat. ”Jealous?”

”Not even slightly,” she said, lips curving. ”I just enjoy being correct.”

He glanced at her sideways. ”You were waiting just to confirm I slept with her?”

She smirked, teeth flashing. ”That. And I want to know what she said. About Ariel.”

He huffed, but didn’t deny anything. He rarely bothered lying to Sira. Too much effort. And she’d just smell the truth under it anyway.

”She said the Delmar family is famous for manipulation,” Lux said. ”That they sell enchanted pearls.”

Sira’s eyes narrowed. ”Enchanted?”

He nodded. ”Rare. Even for us.”

That made her pause. They stopped mid-hall, Lux turning to meet her gaze full-on.

”That’s the problem,” he said. ”The pearls might be from Ariel. Which means... she’s not just some heir with trauma. She’s a bloodline asset.”

Sira blinked slowly. ”So you’re telling me...”

”She might have something inside her,” Lux said. ”A trait. A magic. A lineage, maybe. One strong enough to enchant oceanic pearls. Naturally. Just from her mana.”

Sira let out a long breath. ”So... she’s rare. Like Mira.”

”Exactly.”

Even for demons—especially for demons—some mortal bloodlines weren’t just exotic.

They were powerful. Dangerous. Coveted.

It was easy to dismiss mortals as fragile, short-lived, ignorant of real mana laws. But blood didn’t care about perception. Power didn’t bow to prejudice. There were certain lineages walking the mortal realm that could rival low- and mid-class demons without effort. Sometimes more. Sometimes worse.

Take Mira.

Eastern dragon heiress. Wealth, yes—but that wasn’t what made her dangerous. What made her rare was her legacy. Inheritance. The kind of power etched into her bones before she ever spoke her first word. Old runes threaded through her blood like silver veins. Inherited cultivation paths. Beast instincts fused with aristocratic control.

Mira was a Rare, even by demonic classification.

And Lux knew it.

He didn’t like the implication, but he couldn’t ignore it. Mira could probably level an entire demon camp if she chose to stop holding back. Her magic capacity outpaced most Mid-level demons. Her control was refined. Her pressure, when unleashed, could be felt across dimensions. And she wasn’t even trying.

Then there was Naomi.

On paper? Mortal. Heiress of a global hotel empire. Normal. Ordinary.

But Lux had seen what lay under the surface. Her lineage wasn’t demonic, but it was something adjacent. Something older. Possibly sealed. Possibly sleeping. But still there.

Ariel was another case entirely.

Sweet. Quiet. Broken, maybe. But her bloodline wasn’t. She came from Avariel, kidnapped by the Delmars. Known for trading enchanted pearls. The kind that shouldn’t exist in the quantities they sold. The kind that whispered of a special source—someone born with mana so rich it crystallized.

Ariel might’ve been that source.

And if that was true, then she wasn’t just rare. She should be the kind of girl who could shift economies, vault a family into her own contracts, or become a target for every demon lord with a collar and a plan.

Rava?

Rava was on an entirely different chart.

She was a Kraken.

That word alone carried weight. Ancient ocean bloodline. Sovereign of abyssal depths.

Even among mortals, Kraken-blooded individuals were myths. She wasn’t just rare—she was classified. Her existence bent the rules of known species. Tentacle control, pressure magic, liquid shifting, emotional conductivity—her biology was a symphony of chaos and charm.

Unfortunately, Lux didn’t have the gift of sensing this power.

That was the irony. Despite being a Greed and Lust demon—two of the most perceptive sins—his instincts didn’t naturally pick up on bloodline levels or mana quality. Not unless it was listed. Categorized. Organized. Filed.

If he had their data? Sure. He could process it, compare it, exploit it.

If he fought them? His system would react. Tag power levels. Give readouts. Make adjustments.

But without combat or data?

He was blind.

And it annoyed the hell out of him.

Most of the time, he could read demons and celestials with decent accuracy—Hell and Heaven kept records. Ranked mana trees. Contractual metadata. It was part of the infernal ledger system.

But mortals?

They were inconsistent. Untracked. Too diverse. Too wild. Their bloodlines were unindexed and unpredictable. And sometimes—like now—they surpassed expectation entirely.

Even a demon like Lux could admit it...

Some of the most terrifying powers in the realms... were mortal-born.

And the worst part?

Most of them didn’t even know it.

Sira exhaled. ”Oh... those people are fucked up.”

Her smile curled. ”Can I torture them?”

Lux gave her a look.

Then smirked. ”We, not I,” he corrected. ”But before that—dinner. Ariel needs to calm down first.”

”And you?”

”I need to calm down too.”

They arrived in the dining room.

Lyra and the kitchen staff moved fast, barely making a sound as they laid the cutlery, adjusted the wine glasses, and placed the small appetizers.

Lux took his seat, rolling his shoulders once before leaning back like a man reclaiming a throne. A cup of dark oolong tea appeared in front of him. Wine for Sira.

She raised her glass, swirling it lazily. ”So. Why do you need to calm down?”

He didn’t answer right away.

Not because he didn’t know.

But because there were too many reasons.

He lifted his cup, letting the scent warm his face.

”A lot of things,” he murmured. ”Maybe Ariel. Maybe because my doppelgangers didn’t find anything—no trace, no hint, no signature—on the bounty payers who want my head.”

Sira arched a brow. ”None?”

”Not even a soulprint,” he said, eyes narrowing slightly. ”It’s like whoever sent those angels knew I’d be looking. Cleaned up so well it’s suspicious.”