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“Sex partners.”
It was Prosecutor Joo Taeseon who proposed the idea — under the pretense of having someone who he can “use” to vent out his frustration with the work. He remembered how Lee Chaeha looked when he said that, fear flashing in his eyes before it transformed into something he cannot describe.
For someone so smart, clocking lies and expressions the split second they showed, Lee Chaeha was really an unpredictable man. Which makes Taeseon even more mad at him.
Lee Chaeha. Son of Lee Gilyeong — the man who turned his life upside down.
Lee Chaeha. The man he loathed. The way he would easily bow down despite being scolded, apologizing over and over again even if being reprimanded unjustly. The way the investigator would intentionally make himself small because he didn’t want the scarlet letter to reflect him once again.
The way Chaeha would turn red when spoken to, or when their knees would brush slightly during dinner — or even when he praises him for a minute accomplishment that would normally not elicit such reactions.
Everything about Chaeha made him mad.
And Taeseon’s anger isn’t just about the past. It is driven by how Chaeha continued to defy expectations.
He wanted to break him. He wanted to see how far he can go, how low he can bow. He wanted to see the tears falling down his eyes, begging him to stop. He wanted to see Chaeha suffer — to carry the weight of his father’s sins.
When Chaeha didn’t refuse, nor agree — he just took it as a silent agreement between them. Remembering how Chaeha moaned his name over and over, writhing under him as he forced himself to take Taeseon, the memory made him dizzy. Chaeha’s compliance and submissiveness was enough to infuriate him more.
“Prosecutor, will you be working overtime again tonight?” Section Chief Song’s words broke his trance. He didn’t notice that he was zoning out, the thimble on his finger resting on a page of a new murder case.
“Go home, Chief Song.” he flatly said, clearing his throat before skimming the pages once again.
Chief Song’s brows knitted, but eventually resigned — bidding his goodbyes. Song Haneul’s loud voice echoed through the Prosecutor’s Office, waving Chaeha goodbye to which the investigator returned the friendly gesture.
The office fell into silence, save from the ticking of the wall clock and the hurried flipping of papers. Taeseon glanced through his window, as he watched Chaeha type incessantly on his laptop.
I should have closed the blinds. He muttered to himself.
Yet he did not. Instead, he continued to watch Chaeha work, the light of the lamp illuminating his workspace. He saw the way the blue thimble he had given him rested on his thumb, being used accordingly — a little loose — but Chaeha made it work.
Like he always does.
Everything he throws Chaeha’s way was always followed through. With his investigator’s intellect and wits — he finally understood that Chaeha wasn’t an easy one to break. Chaeha never complained, never showed him any signs of weakness — apart from the prominent bags under his eyes from weeks of being overworked, the man was always as stiff, just like a former cop would.
Even when he relentlessly pistoned his cock in and out of him, Chaeha didn’t complain. Even when he bit every inch of his body — purposely marking him, Chaeha didn’t complain.
“Prosecutor Joo…”
He didn’t notice the door creak open, Chaeha’s figure emerging from the threshold. “Will you be staying here for the rest of the night?”
“Will you?” Taeseon replied, quicker and lighter than intended.
“I might not, I still need to do field investigation with Chief Song later.”
Chief Song. The thought of Chaeha being away from his line of sight and with his Section Chief made his blood boil in many unexplainable ways. His eye twitched before standing up from his desk, arranging the files and stacking them.
“Let’s grab a drink first.”
“But, Prosecutor… it’s late.” Chaeha muttered as he played with his thumbs.
“Are you declining my offer, Officer Lee?”
“N…no…”
“Good. Wait in the parking lot for me.” And just like that, Chaeha sighed before closing the door and walked out of Office 512, the door latch clicking behind him.
The car ride to the gukbap place was silent. Chaeha sat upright with his hands neatly places on his lap while his head turned towards the window, watching the buildings and billboards pass.
“Officer Lee.” Chaeha flinched the moment he heard Taeseon’s voice. His low register sending jolts of electricity across his whole body.
“Yes?” Chaeha replied softly, voice so soft — it was almost a squeak.
“Are you into BDSM?”
“B-BDSM?” Chaeha knew what that was. He had a fair share of porn videos watched because he got curious about what his fellow colleagues were talking about back when he was still a cop. He just listened to the details and looked it up at a site — watching sub and dom dynamics and how it all worked out.
He wasn’t gonna lie. It did intrigue him. But he was too busy with work that he doesn’t have time to explore it in real life — nor did he have someone to explore it with. And now his supervisor was asking him this question, he felt his face flush as his legs squirmed in his seat.
“You’re flustered, again. You’re so easy to rile up. Are you like this with Chief Song as well?” Taeseon smirked, his grip on the steering wheel getting tighter until his knuckles turned white. If Chaeha showed his feelings with the redness of his face, then Taeseon definitely shows his loud jealousy with the sharp cutting words.
By bringing up Chief Song, Taeseon is making it clear who had the absolute control between the two of them. He uses his authority for Chaeha into a deeper level of submission.
“What? No! Prosecutor Joo…”
“Then do it with me. Tonight.”
The sudden invitation made Chaeha choke on his own saliva. Just a half hour ago, his supervisor invited him over for drinks. And now he’s suddenly inviting him over for sex? Memories of that night made Chaeha flustered, putting his legs together and trying to conceal the erection he had.
“Drinks…” Chaeha softly murmured.
“Were you really that naive to believe that we were just going out for drinks?” Taeseon replied, making a u-turn towards where his apartment was located.
Chaeha gulped, warmth rushing up to his face. He was scared, but the bulge in his pants was saying a whole different story.
As they reached the parking lot of Taeseon’s apartment complex, he didn’t waste time and turned off the engine, leaving Chaeha to scramble to his feet, tailing him. Every step towards the door felt like Chaeha’s doom. Something inside him was screaming to get the hell out. But his body moved quicker than his mind ever could, stepping across the threshold and closing the door behind him.
Taeseon turned, removing his trench coat and leaving it on the couch. “Let’s set some rules.”
“Rules?”
“As much as I want to ruin you right where you’re standing, I can’t force you to do anything you’re not comfortable with.”
Chaeha blinked.
Rules.
The man who used to have his way with him on their very first night, ruthlessly marking his body and calling it his was now talking about boundaries. Chaeha clutched the hem of his suit, unblinking.
Taeseon unbuttoned his cuffs, rolling them up until his elbows. His eyes stayed focused on Chaeha, who looked small standing near the doorway of his apartment.
“Don’t look at me like that,” Taeseon scoffed, voice dropping into a dangerous low register. “As much as I know the law, I know how to play the game fairly. If you break too easily, it ruins the fun for me.”
Taeseon took a step towards Chaeha, his long strides reaching him in three. Up close, Chaeha could smell the faint cologne – which was making him lightheaded. “We need a safeword.”
“A safeword?” Chaeha blinked, trying to process the new information.
“Something that means stop. Once you say it, the sex ends. No questions asked. Do you understand?”
Chaeha swallowed, but he nodded. “Yes…”
“So what’s it going to be?” Taeson pressed, his hand reaching for Chaeha’s face, caressing his jaw with tenderness – it was almost enough to fool somebody. “Choose a word. Something you won’t say by accident.”
Chaeha’s mind went completely blank. His heart pounded so hard against his chest that he felt like it was going to bruise his ribs. Under Taeseon’s predatory gaze and the tense atmosphere of the apartment – his eyes traveled the living room to find something to use as a safeword.
“Are you seriously looking for furniture as a safe word?” Taeseon chuckled, clearly amused with Chaeha’s naivety. He started to unbutton his shirt to reveal the pale expanse of his torso.
“I don’t… I don’t know,” Chaeha stuttered. “You choose, Prosecutor Joo.”
“I’m giving you this chance, Lee Chaeha. Don’t give up your only defense before we’ve even started. I’m giving you the reins.”
I’m giving you the reins… What an odd thing to say.
“Scarlet.”
“Scarlet?”
“Y-yes…”
Silence hung in the air before Taeseon clicked his tongue. “Scarlet. Okay. Use it, and I’ll let you go. But until you say it, you belong to me. Understood?”
Chaeha nodded, his grip on his suit getting tighter, the blood probably stopped flowing to his fingertips.
“P-Prosecutor… is this really necessary?” Chaeha now laid on the bed, his hand hoisted up and tied on the headboards. He was naked, the cold air from the air conditioning unit hitting his bare body.
Taeseon didn’t answer. Instead he pulled the rope tighter, making Chaeha wince from the pressure.
“I can’t have you pushing me away. I told you, the only thing you have is the safe word. And until then, I’ll make sure I get my fill.” Taeseon stood from the bed, walking to the closet, and taking out a black velvet box. It looked heavy and expensive – something he didn’t imagine the prosecutor owning.
“What… is that?” Chaeha whispered as he watched Taeseon open the latch of the box with a soft click, opening the lid. Taeseon turned the box so Chaeha could see the full view of what’s inside.
More ropes,
A ball-like thing that had straps beside it,
Three leather whips, in varying length and width,
Two small metal clamps with rubber at the end connected by a chain,
And a long rod, perhaps stainless steel that had ridges.
And many more.
Chaeha’s breath hitched. He saw these things in the videos that he watched. He watched how adult actors used it. Just imagining himself being tortured by these devices was enough to send a surge of heat down his lower half. He watched as Taeseon’s large hands skipped through the ropes and whips before taking out the clamps.
“You look terrified, Lee Chaeha.” Taeseon murmured, dragging the cold metal from his abdomen up his chest. The cold feel of the metal sent shivers all across Chaeha’s body – making him shut his eyes, suppressing the moans that threatened to escape his lips.
Taeson watched as Chaeha squirmed, reacting to any light touch. A small smile formed on his lips, witnessing the ruin of the man he despised the most. Seeing Chaeha naked on the bed, trying his best not to make a sound – trying to look tough – was enough to make him spiral.
His eyes fixed on Chaeha’s perked nipples – looking like a delicious invitation. But he bided his time, slowly dragging the metal clamps across Chaeha’s collarbone as he reveled at the sight of his investigator’s chest heaving frantically.
He wanted to see how long Chaeha could maintain his composure before he completely breaks.
Chaeha felt the rubber tipped clamps traveling from his collarbone down to his chest, before he felt a sharp and sudden pinch as Taeseon clamps his nipples with the device. His back arched from the mattress. It was a novel sensation – pain combined with pleasure. He tried to move but his efforts were futile because the rope that held his hands together sank deeper into his skin.
“Ah!” Tears threatened to fall from Chaeha’s eyes, every sudden movement was making the device clamp harder against his sensitive buds. “Prosecutor… remove it! Please!”
But it was only received by Taeseon’s taunting voice. “Say the safe word, Chaeha.”
The safe word…
Chaeha opened his mouth, but nothing came out. Instead of saying a single syllable, only broken moans escaped his lips. His breaths shook – feeling the way the chain pulled down on his pinched nipples, keeping the stimulation constant.
“Look at you… Thought you wanted to stop? Say it, Chaeha,” the prosecutor prodded, his hands traveling to Chaeha’s eyes to wipe away his tears.
Taeseon’s dark eyes watched Chaeha, every twitch of the lips, every burrowing of the brows. He waited until the fragile little doll on the bed broke. But he got nothing.
Chaeha swallowed hard, chest heaving violently. His mind was consumed with the throbbing pain on his chest and the surge of shameless desire burning between his legs.
“C…Continue… please.” Chaeha shook his head. This was another test, he thought. He thought Taeseon was testing him again. He knew how the man operated: he loved pushing him towards the edge, trying to see when he would finally break.
The words hung in the air, making Taeseon stop. He had expected Chaeha to say something. He had expected Chaeha to weep, to snap, to spit out the safeword. He expected to see Chaeha reach his limit – shattering the compliant facade that he despised so much.
But instead, Chaeha leaned into it – begged for it.
Taeseon clicked his tongue before rummaging back in the box and taking out a leather whip. It was long, the edge flat – designed to sting the skin without doing permanent damage. Taeseon clutched the device until his knuckles turned white.
He adjusted his position, his large hands forcing Chaeha’s legs open and placing himself in between. With his dark eyes not leaving Chaeha, he dragged the whips along the inside of his thighs before flicking his wrist, delivering a blow that made Chaeha’s back arch once again.
“Fuck-“ Chaeha hissed, his hands balling into a fist as his head thrashed against the pillow.
“Say it, Chaeha.” Taeseon’s blood boiled with how stubborn Chaeha was. He flicked his wrist again, whipping Chaeha inside his thighs, near his groin.
“N-no…” Chaeha resisted, shaking his head frantically. Even though tears fell from his eyes, even though his pale skin got red from the whipping, even though his wrists burned because the rope chafed it — he still resisted.
Whack!
“Mmph!”
Whack!
“Taeseon!”
Taeseon? That’s new.
Whack!
“Please!”
Chaeha moaned about everything except for that one color. His thighs were red and his cock leaked, precum dripping down his stomach. His nipples were red from the grip of the nipple clamp. He flinched under the lightest touch of the whip, arching his back in advance — clearly anticipating the pain.
Taeseon’s erection strained his pants, begging for attention. He enjoyed watching Chaeha break under him, crying, begging, saliva drooling down the sides of his mouth. It was making him feel a sadistic sense of authority.
“You act so docile, but you are just another slut, hmm?” Chaeha’s teary eyes fluttered open, looking at Taeseon’s dark eyes. With the little strength he had, he whimpered, nodding weakly.
“Hah…” Taeseon smirked, taking out another device from the black, velvet box. The glint of the stainless rod was illuminated by the dim light.
“P-Prosecutor…” Chaeha whimpered.
“Back to formalities? You were moaning my first name earlier even though I didn’t give you permission.”
“I… I’m sorry…”
Taeseon licked his lips, aligning the device against the slit of Chaeha’s throbbing cock. “Stay still.”
But Chaeha’s body shivered — feeling the cold rod edge his urethra. “What… what are you gonna do with that?”
“To prevent you from cumming.”
“What?”
Before Chaeha could even protest, he felt the rod slip past the opening, sending jolts of pain across his whole body.
“Ahhh!” Chaeha choked out, his hips bucking upwards as his head hit the pillow. It was nothing like Chaeha had ever felt before. It was something invasive, intense — the sensation mixed with both pain and pleasure.
Taeseon pinned his hips onto the bed, gripping his thighs as he continued to drive the rod deeper. “Don’t move. You’ll tear.”
“Please… please Prosecutor… Stop-“ Chaeha sobbed as Taeseon applied the most agonizing downward pressure.
“Say the word.”
Chaeha, cheeks stained with his tears, looked down at Taeseon’s hands which continued to push the rod deeper. He whimpered, but not once did he say the safeword. He started to get used to it, though it was still painful. His cock throbbed with every movement.
“Prosecutor… hic…”
“Hmm?”
“Kiss me.”
The request hung heavy in the air, making Taeseon freeze. He looked at Chaeha, pupils blown and lashes wet. His breath hitched. Of all the things he had expected to hear…
Chaeha begging for mercy.
Chaeha crying out the safe word.
He was met with a desperate plea for a kiss instead.
With a fitting rage, Taeseon loomed over Chaeha, who was still weeping. He expected to see a broken soul, empty eyes looking back at him. Yet he saw hungry eyes that reflected his. It was the complete opposite of the pain he wanted to inflict.
He took his hand and gripped Chaeha’s face, gripping his cheeks tightly it made him wince. “What did you say…”
“Kiss…please…” Chaeha’s chest heaved with every ragged breath, the chain on his chest dangling with every movement. Tears slipped sideways across his temples, soaking the pillowcase wet. The sounding rod was still lodged deep inside his urethra, his cock throbbing with every hiccup. Yet Chaeha looked at his eyes with a desperate, pleading hunger.
“Please…” Chaeha hiccuped, desperately wriggling his hand tied securely against the headboard. It didn’t look like he was trying to escape. If anything, he was trying to reach forward. “Taeseon, please…”
Hearing his name clearly, spoken in pure lust and desperate plea, broke the last thread of restraint he had. It infuriated him. It made his blood run hot… and cold at the same time.
He wanted to despise this man.
He wanted to break him to satisfy the debt of hatred.
But looking at Chaeha now, ruined and crying under him – it felt like he was the one breaking.
“You don’t get to ask for things.” Taeseon growled as his hand shot up to Chaeha’s neck, pressing the area where the jaw met the ear. “You don’t get to make this gentle.”
Despite the sharp, cutting words, Taeseon crashed their lips together. It was violent and bruising – filled with lustful hunger that Taeseon had tried so hard to suppress up until this moment. He poured all his pent up anger, jealousy, and possessiveness inside Chaeha’s mouth, exploring his tongue, leaving no inch untouched.
Chaeha let out a broken sob in between their kiss, his body shaking with pain and pleasure. He leaned upward, just as much as the ropes allowed – receiving Taeseon with the same intensity. He surrendered himself completely – letting himself be consumed by the man who was looming over him. He was getting lightheaded, the blood unable to reach his head with how hard Taeseon was gripping his neck.
Yet he took it all. No complaints.
Taeseon moaned into the kiss, feeling Chaeha’s tongue swirling with his, before breaking it. He took off his pants, revealing the aching length that had been begging for release.
“I’m not going to be gentle with you.”
Chaeha whimpered, catching his breath the moment Taeseon let go of his grip. Without any warning, he felt a painful intrusion in his entrance, feeling every inch all at once.
“Ahh!! Hnhggh…” The sudden stretch tore a shocked scream from Chaeha’s mouth, interrupted when Taeseon completely bottomed out. Chaeha’s eyes fluttered shut – seeing stars behind his eyelids. The double assault from Taeseon’s thrusts and the lodged sounding device inside his urethra almost made him pass out.
“Look at me, Lee Chaeha.” Taeseon ordered. His gripped Chaeha’s thighs hard, forcing it wider, “You’re so tight… fuck… are you trying to choke me?”
“N-no…” Chaeha’s words were weak, his fingernail digging against his own skin. He didn’t even know what he was apologizing for. Was it for existing? Was it for being the son of a murderer? Or was it because despite the white hot pain of Taeseon’s punishing thrusts, he still clenched around his cock? “I’m sorry… please…”
“More…!”
Taeseon thrusted ruthlessly, skin slapping against Chaeha. Every thrust was punishing, void of any sign of gentleness.
“Say the safeword, Chaeha… Say it.” Taeseon was getting out of control. He wanted to force those syllables right out of Chaeha’s mouth. He wanted to win.
But Chaeha kept on shaking his head. He was a sobbing mess, feeling his prostate being hit over and over again – he felt that familiar coiling.
“Fuck, Chaeha. Say it!”
“No! More!”
The rejection… The willingness to stay trapped under him felt like a blow to Taeseon’s chest. He had designed the rules to break Chaeha. But the mess of a man weaponized his submission… to tame Taeseon instead.
“Fuck.”
The sounds of their skin slapping echoed across the whole room. Chaeha’s vision turned white. His body thrashed against the bed while the clamps on his nipples were getting more painful with each punishing thrust. He felt the familiar coiling of his abdomen – but the sounding device lodged in his urethra was making release impossible – trapping the pressure until he felt like he was going to implode.
“Taeseon! Fuck- I wanna cum! Ahhh-” Chaeha begged, his voice breaking. Taeseon looked down at the wreck he made, all crying and drooling, begging for release. It was everything he wanted in the first place. It was the ruin of Lee Gilyeong’s son.
But looking at Chaeha, who still looked at him with adoration beyond the wet lashes – he felt a terrifying ache in his chest. He realized that he wasn’t breaking him… Chaeha was dragging him down the abyss.
“You’re destroying me, Chaeha…” Taeseon whispered, a vulnerable truth slipping past his throat. His thrusts became more relentless and sloppy while Chaeha continued to moan his name over and over again.
“Taeseon…”
“Please, Taeseon!”
“Fuck!”
“Taeseon – ah! Taeseon!”
Without warning, he hooked his finger in the sounding device, yanking it out – making Chaeha arch his back off the mattress. Spurts of cum splattered across his whole chest, his body spasming with the pleasure of release. Taeseon’s breathing turned ragged, his vision tunneling as he felt Chaeha’s walls clamp down on his cock. A few more punishing thrusts and he bottomed out – spilling his seed inside Chaeha.
“Chaeha… fuck…”
Taeseon collapsed forward, his sweat-slicked body colliding with Chaeha. He buried his face in the crook of his neck, lips parted and catching his breath.
He had taken everything from Chaeha. His dignity, his pride… He had ruined him.
But this ruined man still looked at him like he was the center of his universe.
He scrambled to remove the ropes, revealing the raw skin underneath. He caressed it, feeling the guilt gnawing at his chest. But instead, Chaeha pulled him back down, wrapping his arms around him.
“Chaeha…” Taeseon whispered, the name tasting different now.