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eternal resident

Summary:

jungkook wakes up on a remote, luxurious artificial island run by the legendary eros — a powerful coven of designation architects. in this world, everyone has a biological designation: dom, switch, or sub.

they declare the disoriented jungkook their rare, unclaimed sub and decide he belongs to them permanently. no matter how hard he fights or begs to be sent back to his own universe, the eros have no intention of letting their most precious treasure escape.

Chapter 1: the wrong shore

Chapter Text

The sand was warm beneath him, unnaturally so, like someone had heated it from below just enough to soothe. Jungkook’s eyes fluttered open to a sky that was too perfect—soft gradients of dawn pink bleeding into pale blue, with lazy clouds drifting in a slow, deliberate pattern that felt… programmed. He lay there for a long moment, cheek pressed to the black grains, trying to piece together how the hell he’d ended up on a beach.

His head throbbed faintly, the kind of ache that came after too much soju or a bad fall. But he didn’t remember drinking. He didn’t remember falling. The last clear thing was his apartment in Seoul, the low hum of the city outside his window, the smell of ramyeon still lingering in the kitchen. Then nothing. A blank stretch that made his stomach twist.

He pushed himself up on his elbows. The thin silk clinging to his body whispered against his skin—loose pants and a sleeveless top the color of moonlight, nothing like the hoodie and jeans he’d been wearing. No shoes. His feet sank into the warm sand as he stood, flexing his toes. The fabric was so light it barely felt like clothing, cool and smooth, almost alive against the heat rising from the ground.

Above him arched an enormous dome. Transparent panels framed the artificial sky, and beyond the edges he could just make out the faint shimmer of a force field or energy barrier. Tropical trees with broad leaves and bright flowers ringed the beach, their trunks wrapped in soft glowing vines that pulsed gently. The air smelled like salt, plumeria, and something sweeter—vanilla and warm spice that made his chest feel strangely tight.

“What the fuck…” he muttered, voice rough.

A soft chime sounded nearby. Jungkook turned toward a low, sleek pedestal half-buried in the sand. A holographic panel flickered to life as he approached, projecting floating text and images in crisp, elegant fonts.

Welcome to Elysium Atoll.
Protocol Reminder: All unregistered visitors must complete Designation Registration within 24 hours.
Eros Circle maintains full environmental and biological oversight. Enjoy your stay.

Designation? Registration? The words slid through his mind like oil. He swiped at the hologram, trying to dismiss it or find more info. Another panel expanded, showing a calm female voiceover accompanying smooth animations.

“In our world, every adult manifests a clear biological Designation by their mid-twenties. Doms, with their innate drive to guide and protect. Switches, who move fluidly between needs. And Subs, whose nervous and endocrine systems thrive under structured care, sensory calibration, and surrender. These are not preferences. They are measurable traits—pheromone signatures, brainwave patterns, hormonal baselines.”

Jungkook stared, heart picking up speed. The animation showed elegant diagrams of neural pathways lighting up differently for each type. It looked like a high-end wellness ad crossed with some dystopian sci-fi briefing. He laughed once, sharp and disbelieving. “This is a prank. Has to be.”

He turned away from the pedestal and started walking, feet sinking into the black sand. The beach curved gently, giving way to dense tropical foliage. Palm-like trees with silver undersides rustled overhead. Hidden pathways lit up softly under his steps, guiding him forward whether he wanted them to or not. He followed one, pushing through broad leaves that brushed his arms like curious fingers.

No boats. No docks. No visible bridges or tunnels leading off the island. Every time he tried to head toward what looked like the edge of the dome, the path curved back inward with gentle insistence. He climbed a small rise where the trees thinned, hoping for a vantage point. From there he saw it all: the atoll was self-contained, a perfect circle of engineered paradise. In the center, a sprawling villa rose like something out of a dream—curving white walls, wide terraces, water features that spilled into infinity pools. Bioluminescent flowers glowed in shaded groves. Further out, glass structures extended over the water, underwater observatories maybe, their surfaces rippling with reflected light.

And everywhere, that faint shimmer of the dome sealing it all in.

Jungkook’s breath came faster. He ran then, really ran, along the shoreline, silk pants clinging to his thighs with sweat. His bare feet slapped against wet sand where small waves lapped. He shouted for help until his throat hurt, but only the soft crash of artificial surf answered. No ships on the horizon. No aircraft overhead except for a single sleek white drone that hovered briefly, scanned him with a gentle blue light, and drifted away.

He was trapped.

Hours slipped by—he couldn’t tell exactly how many because the artificial sky kept its perfect slow progression. He found freshwater streams trickling from sculpted rocks, drank from them because his mouth was dry as cotton. The nutrient-rich air made him feel strangely energized despite the panic gnawing at his gut. His body didn’t feel right. Too aware. Skin hypersensitive to every breeze, every brush of silk. A low, warm ache had settled low in his belly that he couldn’t name.

He was crouched by one of the streams, splashing water on his face, when the low hum reached him.

A hovercraft.

It glided in silently over the water, sleek and black with silver accents, settling onto the sand with barely a disturbance. The side panel opened with a soft hiss. Six men stepped out.

They moved like they owned the air itself.

The tallest one scanned the beach with calm, intelligent eyes, dark hair falling across his forehead. Beside him, a broad-shouldered man with full lips and an easy grace said something low that made the others chuckle. One with sharp feline features and pale skin tilted his head, nostrils flaring slightly. Another, smaller and luminous, smiled with dangerous sweetness. They all carried themselves with the kind of quiet confidence that made Jungkook’s instincts scream.

He didn’t wait to analyze it. He bolted.

Leaves whipped his face as he crashed into the foliage, heart hammering. Branches snagged his silk top, tearing it slightly at the shoulder. Behind him he heard no frantic shouting, no pounding feet. Just calm, measured voices calling out.

“Easy, little one.”

“No need to run. You’re safe here.”

Their voices carried through the trees like they knew exactly where he was. Jungkook pushed harder, lungs burning, bare feet scraping over roots. Sweat slicked his skin. That strange ache in his body flared hotter, confusing him, making his steps falter for a split second.

A soft scent wrapped around him suddenly—warm, spiced, grounding. It came from everywhere at once. His knees weakened without warning.

He stumbled into a small clearing and there they were, somehow ahead of him. Not even breathing hard. The one with the sharp features and pale skin—pale hair catching the filtered light—watched him with dark, knowing eyes.

Jungkook spun, but another was already there, honey-toned skin and bright eyes that pinned him in place. “Breathe,” the man said gently. “You’re overwhelming yourself.”

“Stay the fuck away from me!” Jungkook shouted, voice cracking. He lunged sideways, but strong arms caught him around the waist—not rough, just inevitable. He thrashed, elbow connecting with something solid, but the man only exhaled softly, absorbing the blow.

“Shh. We’ve got you.”

A cool mist brushed his neck. Jungkook felt the sting of a sedative patch, light and precise. His limbs turned heavy almost immediately, the world tilting like warm honey. The fight drained out of him against his will, replaced by a terrifying floaty calm.

Someone lifted him easily, cradling him against a firm chest. The scent here was strongest—sun-warmed citrus and deep woods. Jungkook’s head lolled against the man’s shoulder. He caught a glimpse of a bright, warm smile and expressive eyes.

“You just became the rarest treasure of the Eros,” the man—Hoseok—murmured against his hair, voice low and almost reverent. His hand stroked slow circles over Jungkook’s back through the thin silk. “Unregistered. Wild. And so damn potent. The others are going to lose their minds when we get you home.”

Jungkook tried to protest, but his tongue felt thick. The world blurred into soft greens and glowing flowers as they carried him back toward the hovercraft. The others walked alongside, their voices weaving together in quiet conversation.

“Pheromones are off the charts, Namjoon,” one said, voice like velvet smoke.

“Strongest wild Sub signature I’ve ever scented,” another agreed, deeper and thoughtful. “No conditioning marks. No registry trace. He’s never been touched by the system.”

A gentler voice, warm and amused: “He’s terrified. Poor thing. We’ll fix that.”

Jungkook’s eyelids grew too heavy. The last thing he registered was the soft hum of the hovercraft lifting off, the warm press of bodies around him like a living cocoon, and the overwhelming sense that whatever this place was, whatever these men were, his old life had just slipped away like sand through his fingers.

The artificial sky above the dome watched on, perfect and unchanging, as they carried him toward the heart of Elysium Atoll.