The Black Door
As the dazzling lights and music gradually faded into the distance, a narrow corridor bathed in soft red lighting came into view.
At the end of the corridor stood a black door, and in front of it was a front desk.
The woman standing behind the desk looked to be in her late twenties, with the kind of beauty that belonged on an idol stage. She wore an extremely short, tight white dress that plunged deep at the chest, leaving her full breasts nearly half-exposed. A luxury gold nameplate was pinned over her breast.
Elly
Her legs were sheathed in sheer white stockings.

She smiled as she welcomed the four of them, then greeted Minhyeok with the easy familiarity of someone who saw him often.
“Welcome, Mr. Minhyeok. I see you’ve brought two guests as referrals today.”
Her voice was clear and crystalline.
Minhyeok nodded.
“Yeah. They’re an old couple of friends of mine. Observation mode tonight.”
The woman handed documents to Taejun and Arin.
“Ah, I understand. Before you enter, please fill out the waiver. It’s a privacy protection and rules agreement. And I’ll need everyone to submit their personal belongings.”
Arin asked back,
“By personal belongings… you mean our phones?”
Elly answered quickly.
“Yes. Security is extremely strict here, so please bear with us. We’ll store everything safely in individual lockers, so you can rest easy.”
She gestured toward the rows of private lockers visible behind her.
The four of them placed their phones, wallets, and other items on the counter. Elly took their belongings, slipped them into one of the locker-like safes behind the desk, and locked it.
Click.
Taejun took the papers and skimmed them quickly.
‘2 hundred million won in damages for disclosing anything that happens inside the club.’ ‘Video archives retained.’ ‘Withdrawal conditions…’
And scattered clearly throughout the text was the word swapping.
Taejun’s eyes went wide. He whipped his head around to stare at Minhyeok, his gaze screaming, What the hell is this?
Minhyeok simply grinned like a fox and shot him a wink, as if to say, Relax. It’s gonna be fun.
Arin asked in a nervous voice,
“What… is this? What exactly are we signing…?”
Taejun shielded the papers with his body so Arin couldn’t examine them closely and signed in a hurry.
“It’ll… be fine. Just a basic consent form. Minhyeok’s vouching for us, and Jieun’s here too…”
Arin still looked uneasy, but when she saw that Taejun had already signed the waiver line for her as well, she reluctantly closed her mouth.
The staff woman smiled and opened the door for them.
“Then please enjoy your evening.”
The moment the door opened, warm, humid air wrapped around the four of them.
What lay beyond was shocking.
A wide space washed in soft red light. Expensive leather sofas were scattered throughout. From the private rooms partitioned by semi-transparent curtains, moans were already leaking out.
On a large wall screen, live footage of men and women tangled together played without pause. On one wall, a massive digital board glowed with the King & Queen Ranking. The names of the current number-one couple, real-time vote tallies, and the rankings for “Most Popular Man” and “Most Popular Woman” updated constantly with shifting numbers.
The soundproofing was perfect; the moment the door closed, the party music was completely cut off. In its place, only low, carnal breathing and moans that managed to slip through the insulation filled the space.
“Nngh…! Kyaa…!”

On a small table by the entrance, animal masks had been prepared—a courtesy for first-time visitors. Taejun was offered a black wolf mask; Arin a white rabbit one.
Arin clung tightly to Taejun’s arm, trembling, looking thoroughly terrified.
“Taejun… I’m… scared… What kind of place is this, really…?”
Taejun soothed her hand and put on the mask. His own heart was pounding hard.
Minhyeok chuckled low and began to explain.
“Welcome! This is Elysium—our own secret swapping club. Roughly three hundred couples are members. Lots of high-ups—assemblymen, media bosses, lawyers, doctors. There are rules, nothing too wild… well, they’re a bit complicated, but I’ll give you the rough version. Once you join, it’s all written in the membership papers anyway, so you can check then.
First: couples are absolutely forbidden from having penetrative sex with each other here. Hell, even kissing isn’t allowed. This place exists solely for sharing partners.
3P is only permitted for that month’s King. Creampies are unofficially banned, but free condoms and morning-after pills are stocked over there.
And the most important thing here is the point system. Basic swap is a hundred points. 3P is three hundred. For women the rates differ—anal is two hundred, creampie is five hundred… Men actually have to give a hundred points to the woman if they do anal or creampie her… Ah, but if a man receives anal play, he gets two hundred points! Not really my thing, but still.
Anyway, the point side’s a little complex, but that’s how it piles up. One point equals a thousand won, and you can cash them out. You can also buy points with cash. Some couples pull in tens of millions a month if they play it right.
That board shows the King and Queen rankings. They change every month by vote. The couple that takes first gets a hundred-million-won prize, exclusive 3P rights, free passes, harem slots—insane perks.”
Jieun took Arin’s hand and whispered softly, sweetly.
“Arin, don’t tense up so much. I was just as scared as you the first time… but later I started enjoying it. Today you can just watch if you want. But… if you stack a few points here, you could open that design studio of your own, couldn’t you? You said you wanted a private design workspace, not just the house, right?”
Arin still asked in a shaking voice,
“Stu…dio? W-wait a second… so basically… you have sex with other men and get cash from the points you earn…?”
Jieun and Minhyeok looked at her, smiling, and nodded.
“You…! You’re crazy…! I can’t do that!”
Arin clutched her chest with both hands and cried out. Her face had gone deathly pale.
Minhyeok and Jieun tried to persuade her, but Arin remained extremely guarded and kept shaking her head.
Taejun simply looked around the vast room with open curiosity. The scenes unfolding under the red lights seized his gaze hard.
Then his eyes met those of a woman standing by one of the sofas.
A beauty with a cold expression. Model-perfect proportions, an icy face.

She looked Taejun up and down, snorted once through her nose, and turned her gaze away. That frigid stare overwhelmed him for a moment.
Minhyeok spotted Han Seua and immediately grew flustered, bowing hastily.
“Ms. Seua, a-ah… hello…”
Han Seua regarded them as if they were beneath notice, then left the room without a word. Every step she took carried an oppressive weight.
Taejun asked Minhyeok,
“Who… was that woman?”
Minhyeok answered in a low voice,
“Han Seua. One of the current Queens here. Former model. People say she rakes in hundreds of millions in points just from this place. The cash she makes converting points is no joke. She took first this round and walked off with the hundred-million prize plus all the special privileges…”
At the word “hundred million,” Arin’s ear twitched faintly. She turned her head as if she weren’t listening, yet she was clearly tuning in to Minhyeok’s words.
Minhyeok continued,
“Every month there’s a King and Queen survival. Contests like lasting the longest before cumming, making the woman orgasm first, or making a guy finish fast with a blowjob.”
The crude terms spilling from Minhyeok’s mouth made Arin squeeze her eyes shut.
Then Minhyeok, like a horse that had slipped its reins, kept talking.
“And! Let’s be real… you two are sexless. Honestly, if you come here, both of you could get satisfied.”
Arin’s face flushed bright red. She glared at Taejun and snapped,
“Honey…! You told Minhyeok about that…?”
Taejun soothed her with an awkward expression.
“Arin, it’s not like that… you and I… neither of us is really satisfied, right…? Can’t we just look around a little?”
But Arin refused to the end.
“No! I’m not doing it! I’m leaving!”
She shook off Taejun’s arm and strode toward the door first. Taejun had no choice but to follow her out.
Minhyeok hurriedly caught Taejun’s arm and pressed a business card into his hand.
“Hey! Today I was the referral so I didn’t take your IDs, but next time you come you’ll need this card. And from next time on you have to leave your IDs too. Make sure you bring it!”
Taejun took the card and looked back at the red-lit space one last time with lingering regret.
Beyond the semi-transparent curtains, moving shapes were clearly visible. In one couple the woman was on her knees on a sofa, taking a man deep into her throat. In another space two men were sandwiching a woman from front and back, hips slamming like mad.
Bodies rippled like shadows; sweat-slick skin gleamed under the red light.
“Haang…! Ahht…!”
The moans weren’t loud thanks to the soundproofing, yet they still slipped through—low, sensual sounds that made Taejun’s ears prick.
His gaze locked on one spot. Beyond a curtain, a woman’s waist arched hard as her body shuddered. The clear sight of her legs convulsing in spasms made him swallow dryly. Inside his pants he was already rock-hard, ready to burst.
Arin’s sharp voice cut from the corridor.
“Hey! Kang Taejun! Are you coming or not?!”
“Y-yeah… I’m… coming…”
Taejun cast one final longing look at the space, then followed Arin up the stairs.
Thud. Thud.
When they reached the front desk, the provocatively dressed staff woman Elly smiled and greeted them in a clear, coquettish voice.
“Oh my! Leaving already? Just a moment… I’ll get your things….”
Elly opened locker number 103 behind her, took out Taejun and Arin’s belongings, and said,
“Please come again next time…♥”
The two of them took their things and walked back down the corridor, emerging once more into the noisy penthouse party.
Thump♪ Thump♪ Thump♪ Thump♪
The dazzling lights, music, and laughter pulled them back into reality.
Taejun walked behind Arin, the afterimages of the red space he had just seen refusing to leave his mind.
Arin rode the elevator down without uttering a single word. Her hands were still trembling faintly.
They headed home in complete silence. Even in the taxi Arin only stared out the window, while Taejun quietly stole glances at her profile. Heavy silence filled the car.