Blood tasted like old pennies.

I spit it out onto the concrete floor. It was red and thick.

"Get up, JK!" the crowd screamed. "Kill him!"

I shook my head to clear the dizziness. The man standing in front of me was twice my size. He was a mountain of muscle called 'The Butcher.' He had just cracked my rib.

My chest burned. My left eye was swelling shut.

But I didn't feel fear. I felt alive.

The Butcher swung his fist. It was slow. Sloppy.

I ducked. The air whooshed over my head.

I didn't waste energy. I stepped inside his guard and drove my elbow into his throat.

Crunch.

The Butcher gagged and stumbled back. I spun around and kicked his knee. He went down with a heavy thud that shook the cage.

He didn't get back up.

The bell rang.

"Winner! The Underground Prince! Jeon Jungkook!"

The crowd roared. They threw money and beer cups into the cage. The noise was deafening. It sounded like a pack of wolves.

I stood in the center of the ring, chest heaving, sweat dripping down my back. I wiped the blood from my lip with the back of my hand.

I hated them. I hated the noise. I hated the smell of cheap cigarettes and desperation. But I needed the money.

I looked up toward the VIP balcony. Usually, the rich men up there were cheering, drinking champagne, and betting on our lives like we were racehorses.

But tonight, one man was different.

He was standing in the shadows of the highest box.

He wasn't cheering. He wasn't drinking. He was perfectly still.

He was wearing a dark grey suit that looked like it cost more than my entire life. His hair was black, slightly curled, falling over his eyes.

And he was holding a sketchbook.

While everyone else was screaming, this man was... drawing.

He looked up from his paper.

Our eyes locked.

Even from this distance, I felt a chill run down my spine. His eyes were dark, sharp, and cold. He didn't look at me like a fighter. He looked at me like I was a piece of meat. Or a statue.

He slowly raised a charcoal pencil and pointed it at me. Then, he tilted his head and smiled.

It wasn't a happy smile. It was the smile of a predator finding a wounded animal.

I shivered, breaking eye contact. I turned and limped out of the cage.

The Locker Room

The adrenaline was fading. Now, the pain was coming.

I sat on the wooden bench in the locker room. It smelled of mold and sweat. I grabbed a bottle of water and poured it over my head, washing away the blood.

"Good fight, kid."

My boss, Mr. Kang, walked in. He was a greasy man with gold rings on every finger.

"Where is my money?" I asked, wincing as I pulled off my hand wraps. "I won. That's two thousand."

Mr. Kang didn't hand me an envelope. He just stood there, looking nervous.

"About the money, Jungkook..."

I stood up. "Don't tell me you bet it away again."

"No," Kang said, sweating. "But... your father’s debt. The interest went up."

"I paid the interest!" I shouted, stepping forward. "I fight every week for you!"

"It’s not my debt anymore," Kang whispered. "I sold it."

"You what?"

"I sold your contract. To him."

Kang pointed to the door.

The metal door creaked open.

The air in the room changed instantly. The smell of sweat vanished, replaced by the scent of expensive cologne—sandalwood and cold rain.

The man from the balcony walked in.

Up close, he was terrifyingly beautiful. His skin was pale and flawless. His suit was sharp enough to cut. He looked completely out of place in this dirty hole.

He looked at Mr. Kang. He didn't speak. He just flicked his fingers.

Two massive bodyguards in black suits stepped forward and dragged Mr. Kang out of the room. Kang didn't even fight. He looked terrified.

Now, it was just me and the stranger.

"Jeon Jungkook," the man said. His voice was deep, smooth, and low. It vibrated in the small room.

I clenched my fists. "Who are you?"

"I am Kim Taehyung," he said. He took a step closer, his shiny leather shoes avoiding the bloodstains on the floor.

He looked at my bruised chest. He looked at the cut on my lip. He looked at my swollen eye.

Most people looked away from my injuries. He stared at them. He looked fascinated.

"You are a mess," Taehyung murmured. He reached out a hand.

I flinched back. "Don't touch me."

Taehyung froze. He looked surprised that I dared to move away. Then, a dark amusement filled his eyes.

"Defiant," he whispered to himself. "Perfect."

He pulled a folded piece of paper from his pocket and dropped it on the bench.

"That is your debt," Taehyung said. "Three hundred million won. Your father borrowed it from the wrong people. And now, I own it."

My legs felt weak. Three hundred million. I could fight for a hundred years and never pay that back.

"I don't have the money," I gritted out. "Kill me if you want. I have nothing."

"I don't want money," Taehyung said softly.

He stepped into my personal space. He was taller than me, just slightly, but his presence filled the room.

He reached out again. This time, he was too fast. His hand—long, elegant fingers—gripped my chin. His grip was surprisingly strong. He tilted my face up.

He studied my bloodied lip like it was a masterpiece.

"You have a face that holds pain beautifully," Taehyung said. "I am an artist, Jungkook. And I am currently... uninspired."

He ran his thumb over the cut on my lip. It stung.

"I have a proposition," he said. "Come with me. Live in my house. Be my model for thirty days. Let me paint you. Let me use you."

"Use me?" I snarled, trying to pull away. "I’m not a whore."

"For my art," Taehyung corrected sharply. His eyes darkened. "If you last thirty days, the debt is erased. You walk away free."

"And if I refuse?"

Taehyung let go of my chin. He took a handkerchief from his pocket and wiped my blood off his fingers, looking at me with cold indifference.

"Then my men outside will break your legs," he said simply. "And then they will find your grandmother."

My blood ran cold. He knew about Halmoni.

I looked at him. He was a monster wrapped in silk.

I had no choice.

"Fine," I whispered, hate burning in my chest. "Thirty days."

Taehyung smiled. It was the most terrifying thing I had ever seen.

"Good choice, my Muse."

He turned to the door.

"Clean yourself up," he ordered over his shoulder. "I don't want your filth in my car. But keep the blood. The red looks good on you."

The car was silent.

It was a black Maybach with tinted windows. The leather seats were soft, smelling of new money. I sat on the edge of the seat, careful not to let my bloody clothes touch the pristine interior.

Taehyung sat next to me. He was reading a French magazine, his legs crossed elegantly. He didn't look at me once during the forty-minute drive.

It was infuriating. He had just bought my life, and now he was ignoring me like I was a piece of luggage.

We drove up into the hills of Hannam-dong, where the air was cleaner and the houses had gates higher than prison walls.

The car stopped in front of a massive structure made of concrete and glass. It didn't look like a home. It looked like a modern art museum. Or a mausoleum.

"Get out," Taehyung said, closing his magazine.

The Entryway

The front door unlocked with a digital chime.

I stepped inside. The floor was black marble, polished to a mirror shine. I could see my own bruised reflection looking back up at me. The house was freezing cold.

"Shoes," Taehyung ordered.

I kicked off my worn-out combat boots. They left a faint smudge of dirt on the marble.

Taehyung stared at the smudge. His jaw clenched.

"Maid," he called out softly.

An older woman appeared instantly from a side door. She didn't look at me. She kept her head bowed.

"Clean that," Taehyung pointed at the dirt. "And burn his clothes."

"Hey!" I protested. "That's my jacket. My leather jacket."

Taehyung turned to me slowly. He stepped close, invading my personal space again. The smell of sandalwood was suffocating.

"You don't own anything here, Jungkook," he said, his voice low and devoid of emotion. "Not your jacket. Not your name. And for the next thirty days... not your body."

He gestured to the maid.

"Take him to the guest wing. Shower. Scrub him until the water runs clear. If I see one speck of dirt on him when he enters my studio, you are fired."

The maid nodded terrified. She grabbed my arm. "This way, sir. Please."

I looked at Taehyung. I wanted to punch that perfect, arrogant face. But the memory of his threat—my grandmother—held me back.

I let the maid pull me away.

The Shower

The bathroom was the size of my entire apartment.

I stood under the scalding hot water for twenty minutes. I scrubbed my skin until it was raw. The water swirling down the drain was pink with dried blood.

I watched it disappear. I felt like I was washing away my armor.

When I stepped out, there were no clothes waiting for me. Just a white silk robe.

I put it on. It was soft, light, and felt alien against my scarred skin. I looked in the mirror. My lip was split. My eye was purple and yellow. My torso was a map of old scars and fresh bruises.

I didn't look like a model. I looked like a victim.

There was a knock on the door.

"Master is waiting," the maid whispered.

The Studio

I was led down a long hallway to the top floor. The door at the end was heavy oak.

I pushed it open.

The room was massive. The ceiling was entirely glass, revealing the night sky and the moon. The room smelled of turpentine, linseed oil, and something metallic.

Dozens of canvases were stacked against the walls, covered in white sheets. I couldn't see what was painted on them.

In the center of the room was a wooden platform. And next to it, an easel.

Taehyung was standing there. He had removed his suit jacket and rolled up his white sleeves to his elbows. His forearms were veined and strong—surprising for an artist.

He was mixing red paint on a palette. Slash. Slash. Slash. The sound of the palette knife was sharp.

He looked up.

His eyes swept over me, taking in the white silk robe, my damp hair, and my bruised face.

"Better," he murmured.

He pointed to the wooden platform.

"Sit."

I walked over. The wood was cold under my bare feet. I sat on the edge of the platform, pulling the robe tighter around me.

"What are you going to paint?" I asked, my voice echoing in the large room.

"Silence," Taehyung commanded.

He picked up a brush. He stared at me. He didn't blink. It felt like he was dissecting me with his eyes.

"Open the robe," he said.

I froze. "What?"

"The robe," Taehyung said calmly. "Open it. I need to see the canvas."

"You said you wanted to paint my face," I argued, clutching the fabric.

"I said I wanted to paint pain," Taehyung corrected. "And your face is only half the story. The rest is written on your ribs."

He set the brush down. The silence stretched, heavy and dangerous.

"Do not make me ask twice, Jungkook."

My heart hammered against my ribs. My hands shook. Slowly, I loosened the belt.

The silk slid off my shoulders. It fell to my waist.

I sat there, half-naked, exposed under the cold studio lights. The air conditioning bit at my skin.

Taehyung didn't leer. He didn't look at me with lust.

He looked at me with hunger.

He walked closer. He stood right in front of me, between my knees. He reached out and traced the long, jagged scar on my abdomen—a souvenir from a knife fight three years ago.

His fingers were freezing cold.

I shuddered.

"Beautiful," Taehyung whispered. His voice was breathless, almost reverent. "So much violence in one body."

He looked up into my eyes. For the first time, I saw something behind his cold mask.

Obsession. madness.

"Don't move," he whispered. "Don't breathe. Just... exist for me."

He turned back to his easel and began to paint.

For hours, the only sound in the room was the scratch of the brush against the canvas and the sound of my own terrified heartbeat.

I was trapped in the glass cage. And the monster was painting my soul.

The scratching sound of the brush finally stopped.

"Done," Taehyung announced.

The single word hung in the air like a gavel striking a judge's desk.

My body screamed in protest. I had been sitting on that hard wooden platform for three hours without moving. My broken rib throbbed in a steady, sickening rhythm. My legs were numb. The sweat on my back had dried into a cold, sticky film under the open robe.

Taehyung set the palette down. He wiped his hands on a rag, completely ignoring me again. The intense, burning obsession in his eyes vanished, replaced by that wall of indifference.

It was like he had flipped a switch. The "Artist" was gone. The "Master" was back.

I tried to stand up.

"Ahh," I hissed through my teeth.

My knees buckled. My muscles had locked up from the tension and the injuries. I stumbled forward, my bare foot slipping on the smooth floor.

I braced myself for the impact of the hard wood.

But it never came.

A hand—strong and unyielding—caught my arm.

I looked up. Taehyung had moved with supernatural speed. He was holding me upright, his fingers digging into my bicep. He wasn't gentle, but he was stable.

"Careful," he murmured, his voice flat. "I need you in one piece for tomorrow."

"My legs..." I gritted out, humiliated by my weakness. "They’re asleep."

"You have excellent discipline," Taehyung noted, looking at my face. He wasn't complimenting me; he was evaluating me. "Most people fidget after twenty minutes. You sat still through the pain. Like a statue."

"I'm used to pain," I spat, trying to pull my arm away. "It's the only thing that's real."

Taehyung’s grip tightened for a fraction of a second. He pulled me closer, just an inch, forcing me to look at the painting on the easel behind him.

I gasped.

It wasn't finished, but the outline was there. It was me. But it wasn't the me I saw in the mirror.

The Jungkook on the canvas looked... holy. The bruises were rendered in lush purples and golds. The blood looked like rubies. He had made my suffering look like something religious.

"Is that how you see me?" I whispered, disgusted and mesmerized at the same time. "Broken?"

"I see the tragedy," Taehyung corrected. He let go of my arm. "Cover yourself. You are shivering."

I pulled the white silk robe tight around my chest, hiding the scars, hiding the "art."

"Follow me," Taehyung ordered. "You need to eat. If you lose weight, it ruins the continuity of the painting."

The Dining Room

The transition from the studio to the dining room was a blur of marble hallways and expensive shadows.

The dining table was long enough to seat twenty people. I sat at one end. Taehyung sat at the head.

The maid placed a bowl in front of me. It was porridge. Bland. Nutritious. Warm.

I stared at it. My stomach roared, reminding me I hadn't eaten since before the fight.

"Eat," Taehyung said. He wasn't eating. He was sipping a glass of dark red wine, watching me again.

"I'm not a dog," I muttered, picking up the spoon. "Stop watching me eat."

"I own the view, Jungkook," Taehyung replied smoothly. "I paid three hundred million for it. I will watch whatever I please."

I slammed the spoon down. Clatter.

"Why me?" I asked, my voice shaking with anger. "There are a thousand pretty boys in Seoul. Why did you buy me?"

Taehyung swirled his wine. He looked into the dark liquid as if reading the future.

"Because the others are empty," he said softly. "They smile because they want my money. They pose because they want fame."

He looked up. His gaze pierced right through me.

"But you... you look at me with murder in your eyes. You hate me. And yet, you sit there and eat my food because you want to survive."

He stood up and walked toward me. The sound of his footsteps on the marble was like a ticking clock.

He stopped behind my chair. I stiffened. I could feel his body heat radiating against my back. He leaned down, his lips brushing my ear.

"I want to capture that," he whispered. "I want to paint the moment that fire in your eyes finally goes out."

I shivered violently. It wasn't from the cold this time. It was fear. He didn't just want to paint me. He wanted to break me.

"Eat," he commanded again, straightening up. "Then go to your room. The maid will show you the way."

The Bedroom

I ate. I hated myself for it, but I ate every bite. I needed the strength.

The maid led me to the guest wing. She opened a door to a room that was nicer than any hotel I’d ever seen. King-sized bed. Grey velvet curtains. A window overlooking the city lights below.

"Goodnight, sir," she whispered, and quickly backed out.

I heard the door close.

Click.

Then, a second sound. A heavy, metallic thud from the other side.

I froze.

I ran to the door. I grabbed the handle and twisted.

It wouldn't move.

"Hey!" I shouted, pounding on the wood with my fist. "Open the door!"

Silence.

"Taehyung!" I screamed. "You can't lock me in!"

I heard footsteps approaching from the other side. They stopped right in front of the door.

"I told you, Jungkook," Taehyung’s deep voice came through the wood, muffled but clear. "You are not a guest."

"I'm not a prisoner!"

"For thirty days," Taehyung replied, his voice terrifyingly calm, "you are whatever I say you are."

I heard his footsteps walking away, fading into the silence of the massive house.

I slumped against the door, sliding down until I hit the floor. My rib throbbed. My head spun.

I looked at the window. It was reinforced glass. Sealed shut.

I was trapped.

I looked at the luxurious bed, inviting and soft. I couldn't sleep there. That was his bed. His charity.

I curled up on the rug in the corner of the room, hugging my knees to my chest. I stared at the door, waiting for it to open.

It didn't.

The monster had put his muse in a box. And he had the only key.