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HaeHyuk | Merman Captive of My Obsession

Summary:

⚠️⚠️sex btw HUMAN - MERMAN⚠️⚠️

A scientist 🧑‍🔬 seduces a captive merman 🧜‍♂️ leading to forbidden passion and groundbreaking reproductive research findings.

Work Text:

Deep beneath the dark waters of the Pacific Ocean lies the hidden research center 'OceanixLab' where Dr. Donghae, a renowned marine biologist, encounters what he initially considers just another "test subject"

 

This subject is Hyukjae, a merman with pearl-white skin, shimmering silver tail scales, and eyes brimming with both rage and despair. Hyukjae was captured from the depths of the ocean and confined in a massive glass tank filled with simulated saltwater. Trapped and unable to escape, he endures the stares of humans who view him as a freak of nature.

 

Donghae, the lead researcher overseeing the merman project, has spent months observing and documenting Hyukjae's behavior. Over time, he feels an inexplicable pull toward Hyukjae. Every moment standing before the glass tank, gazing into Hyukjae’s eyes, makes his heart race uncontrollably. It’s no longer just scientific curiosity; it’s something deeper, raw, and primal.

 

One late night, after the other staff have gone home, Donghae sneaks into the lab for a "private inspection" of Hyukjae. He stands before the tank, hand pressed against the cold glass, eyes locked on the merman’s beautiful tail swaying slowly in the water.

 

“What are you staring at human?”

 

Hyukjae snaps, his tone icy but laced with defiance. He swims closer to the glass, almost pressing against it, his gaze burning with hatred yet tinged with curiosity.

 

“What do you all want from me? To cut me open alive or what?”

 

Donghae smirks faintly, activating the microphone connected to the tank’s speakers.

 

“I just wanna know how you feel, being locked up like this… alone… with no one around”

 

He says, his voice low and laced with a subtle edge.

 

“Or is there something more you crave?”

 

Hyukjae frowns, confusion flickering across his face.

 

“What the hell do you mean?”

 

He shoots back, trying to sound tough, but a hint of vulnerability creeps into his voice.

 

Donghae presses a button to lower the water level in the tank, exposing more of Hyukjae’s body. He grabs a special key to unlock the tank and, within moments, stands face-to-face with the merman, no barriers between them.

 

“This is what I mean…”

 

Donghae steps closer, their bodies mere inches apart. The salty scent of Hyukjae’s wet skin fills his senses, making his pulse quicken.

 

“Have you ever thought about it? That burning feeling… that explosive need?”

 

Hyukjae stares at him, expression blank but body trembling slightly as Donghae’s fingers brush his damp shoulder.

 

“Don’t mess with me… you filthy human”

 

He growls, though his voice wavers as Donghae’s touch slides down his collarbone.

 

“Filthy? Is that so?” Donghae chuckles softly. He pulls Hyukjae closer until their foreheads nearly touch. “If I’m filthy, then what about you? Look at yourself… your body’s reacting to me so clearly.”

 

Hyukjae grits his teeth, trying to push Donghae away, but his strength seems to falter against the determined human. He feels Donghae’s hands grip his hips, fingers tracing over the cool scales of his tail.

 

“Stop… damn it…”

 

Hyukjae struggles, but Donghae pins him down against the dry bottom of the tank. One hand steadies the merman’s wet frame while the other roams over the sensitive junction between his tail and upper body.

 

“Stop? But I can see you’re enjoying this”

 

Donghae whispers near Hyukjae’s ear, his voice thick with lust.

 

“Tell me… how high is that heat building inside you? Want me to help you release it?”

 

Hyukjae’s breaths come in short gasps, his eyes shutting involuntarily as Donghae’s touch intensifies at a vulnerable spot. He bites his lip hard to stifle a moan.

 

“You… you’re insane…”

 

“Insane? Then let’s be insane together”

 

Donghae mutters, lowering his head to kiss Hyukjae’s neck. His tongue traces the salty skin, only fueling his desire further.

 

“Tell me… what do you want next? Want me to pound you until you forget who you are?”

 

Hyukjae shudders, no longer able to deny the sensation overwhelming him. The heat surging through his body clouds his mind.

 

“Do… do whatever you want… if you’re so desperate”

 

He stammers, his voice quivering, eyes full of reluctant surrender.

 

Donghae grins with satisfaction, quickly shedding his shirt to reveal a toned, muscular body. He pulls Hyukjae closer, grinding against the merman’s sensitive areas.

 

“Good boy… you’re gonna find out a human like me can give you more than you ever imagined"

 

Donghae says with unshakable confidence. His hand explores the hidden spot beneath Hyukjae’s thin scales, teasing it slowly.

 

Hyukjae lets out a loud moan, unable to control himself as the unfamiliar sensation drives him to the edge.

 

“Oh… no… there… it’s…”

 

He can’t finish, overwhelmed as Donghae increases the pressure.

 

“Like that, huh? Tell me… want it harder?”

 

Donghae asks, locking eyes with Hyukjae, whose gaze is clouded with raw need. He doesn’t wait for an answer, moving his body in sync with the intensifying touch.

 

They sink deeper into a haze of lust and secrecy within the silent lab. Their moans and crude words echo in the air. Donghae knows this is wrong, yet it feels disturbingly right as Hyukjae trembles beneath his control.

 

“You’re mine… got it? Tonight… and every night after this"

 

Donghae growls, before they both reach the peak of their desire together.

 

In the shadowed lab, a forbidden connection between human and merman takes root, with no one knowing where it might lead them in the future.

 

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The morning after that heated night, Donghae returns to his desk, still feeling the exhaustion from their intense encounter. He sits before his computer, opening the file for his research report. His gaze drifts to the glass tank where Hyukjae floats silently, the merman’s face a mix of confusion and fatigue.

 

“Last night… that shouldn’t have happened"

 

Hyukjae mutters, his voice faint through the tank’s speakers. He glares at Donghae with a mix of anger and weakness.

 

“You’re disgusting, using me as your experiment”

 

Donghae glances over, a smirk tugging at his lips as his fingers continue typing.

 

“Disgusting? Then you’re just as bad, Hyukjae. It was obvious you loved every second of what I did,” he taunts.

 

“Or do you want me to prove it again, right here?”

 

Hyukjae clenches his jaw, his face flushing with both rage and embarrassment. He turns away, refusing to respond, though deep down, he knows Donghae’s words strike a painful truth he can’t admit.

 

Donghae laughs under his breath, focusing back on his report. After last night, he’s gained more insight than he ever hoped for. The mystery of human-merman reproduction, a puzzle scientists at AquaChron have grappled with for years, now seems clearer in his grasp. He logs every detail, Hyukjae’s physical responses, behaviors, and even the intimate emotional reactions during their encounter. He writes it all with precision, unashamed to document the overly personal aspects.

 

“The central office is gonna lose it when they read this,”

 

Donghae murmurs to himself, hitting ‘send’ to upload the report to AquaChron’s main database. He leans back in his chair, eyes fixed on Hyukjae, who still avoids his gaze.

 

“You’ve helped me more than I expected, my little merman.”

 

“Don’t call me that”

 

Hyukjae snaps, though his voice lacks strength.

 

“I hate you… hate everything you’ve done.”

 

“Hate? Really?”

 

Donghae stands, approaching the tank once more. He presses a hand against the glass, staring into Hyukjae’s conflicted eyes.

 

“But your body said something else last night. Don’t lie to yourself, Hyukjae. You want me back in there… want me to touch you again.”

 

Hyukjae’s breathing quickens. He tries to suppress the stirring inside him, but Donghae’s cold confidence and piercing tone weaken his resolve.

 

“You think I’d let you do that again?”

 

He asks, voice trembling slightly.

 

“I don’t think. I know”

 

Donghae replies instantly. He presses the button to lower the water level again, a sly grin spreading across his face. After struggling with answers for so long, Donghae knows this report, born from their forbidden night, will change everything in the study of merman biology at OceanixLab.

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