Black Coin

[Chapter 6: The Calculation of Value]

[Chapter 6: The Calculation of Value]

"Okay then..."

Seven’s voice was calm. It was a flat, even baritone that should have been comforting. But in the silence of the apocalypse, that calmness was a blade. It cut through the receiver, severing the last thread of hope Chen Sixuan was clinging to.

"Good luck to you, Teacher Chen."

Seven didn't hesitate. His finger hovered over the red icon on the screen. He wasn't being cruel; he was being efficient. Altruism was a luxury of the old world. In this new reality, calories were currency, and carrying dead weight was a fast track to the grave.

He didn't hate her. He just didn't need her.

Click.

He started to press down.

"WAIT!"

A scream tore through the speaker. It wasn't a plea; it was a shriek of primal terror.

On the other end of the line, Chen Sixuan’s eyes were wide, the whites showing all around her pupils. Her chest heaved violently, gulping down air like a drowning woman. The realization had hit her: Sex isn't enough. This student didn't want a body. He wanted value.

She had to sell herself, but not her flesh. She had to sell her mind.

"The Star Orbital!" she gasped, the words tumbling out in a frantic rush. "It was initiated in 2039! Originating from Dragon Country! It covers 126 countries, 34 regions, spans nine continents and four oceans!"

Seven paused. His finger stopped millimeters from the hang-up button.

Chen Sixuan heard the silence. She took it as a sign to keep talking, to scream her worth into the void.

"It crosses thirteen Star Abyss Destruction Zones! The total track length exceeds 320,000 kilometers! I know this! My father... my father was a Level-One Maintenance Master for the Star Orbital Project!"

Seven’s eyes narrowed. Level-One Maintenance Master. That wasn't a janitor. That was an engineer with top-level clearance.

"I have his journals!" Chen Sixuan cried, her nails digging into her thigh until blood bloomed on her silk pajamas. "I know all 1,266 stops! I know the locations of the 625 hidden backup tracks used for maintenance! The maps don't show those! The GPS is dead, but I know where they are!"

She swallowed hard, her throat dry.

"And... and I speak five languages! I can translate! I eat very little! I can cook! I can clean! Just... just take me with you! I will agree to anything! Anything!"

She screamed the last word with every ounce of strength she had left.

Then, silence.

The line went dead quiet.

Seven stood in the dim light of the third carriage, the phone pressed to his ear. His mind was racing, calculating variables at lightning speed.

Variable A: A generic survivor. Cost: Food, water, oxygen. Benefit: Low. Result: Reject.

Variable B: A living navigation system with knowledge of hidden supply lines and repair depots. Cost: Food, water, oxygen. Benefit: Critical. Result: ...

The Star Orbital was a maze. A 320,000-kilometer labyrinth of steel encircling the planet. Without GPS, Seven would be driving blind. He could smash into a broken section of track or wander into a high-radiation zone without warning.

But a map of the backup tracks? That was a game-changer. Those tracks would have supplies, tools, and shelter. They were safe havens hidden in the code of the railway.

"She's not a pet," Seven thought, his cynical gaze softening just a fraction. "She's a manual."

He brought the phone back to his mouth.

"I'll come pick you up."

Six words.

On the other side of the city, Chen Sixuan felt her knees buckle. The world spun. The rush of relief was so intense it felt like a physical blow. She slumped against the wall, sliding down to the cold floor.

"I... I'm at..." She stammered, her brain misfiring. "I'm at 901! Block 3! Jiangzhou Road Yushui Garden!"

Beep.

The sound was sharp and final.

Chen Sixuan froze. She looked at the phone. The screen was black.

"Hello? Seven?"

She tapped the screen frantically. Nothing. She held the power button down. Nothing.

The battery had died.

"No..."

Her breath hitched. Did he hear the address? Did he hear "Yushui Garden"? Or did the line cut off at "Block 3"?

Panic, cold and suffocating, clawed at her throat.

"Ah!"

She screamed, hurling the dead phone across the room.

CRACK!

It smashed against the opposite wall, shattering into plastic and glass shards.

"He heard it," she whispered, rocking back and forth, hugging her knees. "He must have heard it. He has to."

She was hyperventilating. To stop herself from going insane, she scrambled to her feet. She ran to her bookshelf, tearing through volumes of encyclopedias and old engineering manuals. She needed to find her father’s notes. She needed to prove she was useful. If Seven came and she didn't have the intel... he would leave her. She knew it.

[Location: University City Subway Station - Maintenance Tunnel]

Seven looked at the black screen of his own phone.

"Yushui Garden. Block 3. 901."

He memorized the address instantly.

He slid the phone into his pocket and let out a long breath. Sigh.

"Teacher Chen," he muttered to the empty carriage. "You were the idol of the university. The untouchable goddess. And now look at you. Begging a student for a ride."

He didn't feel superior. He felt a grim confirmation of his worldview. The apocalypse didn't build character; it revealed it. It stripped away the social contracts and left only the raw, ugly instinct to survive.

He had accepted her offer. Not because he wanted a companion. Not because he wanted sex.

"Groups are dangerous," Seven analyzed. "Strangers are unpredictable. But she... she's terrified. And she's familiar. A known variable is safer than a random one."

Plus, the map.

"Knowledge is power," Seven whispered. "And she just handed me the keys to the highway."

He checked his watch.

18:00.

"Forty-five minutes until full dark."

Seven shook his head, clearing his thoughts. He couldn't afford to waste time thinking about the morality of saving a teacher. He had a train to build.

He grabbed the welding torch.

Click. Fwoosh.

The blue flame roared to life. Seven threw himself back into the work.

[ MECHANICAL HEART: ACTIVATED ]

Blue energy surged from his chest, flowing down his arms and into the welding rig. He wasn't just melting metal; he was fusing it at a molecular level.

Spark! Hiss!

He moved with the precision of a machine. The heavy composite armor plates he had manufactured earlier were lifted into place, not by a crane, but by his own enhanced strength and the magnetic guidance of his skill.

Clang!

He sealed the window frame of the third carriage.

"Thirty percent integrity increase," Seven noted, his eyes scanning the seam. "Good enough to stop a sniper round. Maybe even a light explosion."

He stepped back, wiping grime from his face. The heat in the tunnel was stifling, but he didn't stop.

He looked at the beast he was building.

The Infinity.

It was starting to look less like a train and more like a rolling bunker.

The first carriage was the bridge and storage.

The second carriage was the future farm.

The third carriage... the workshop.

But Seven wasn't satisfied. Survival wasn't just about not dying. It was about living.

"I need more," Seven muttered, walking the length of the tunnel.

He ticked off the list in his head.

"Generator. High-capacity, low-noise. I need to raid the hospital backup systems for that."

"Heating equipment. The eternal night brings the cold. If the temperature drops below zero, we freeze to death in our sleep. I need industrial heaters."

"Water purification. Essential. I can't scavenge bottled water forever."

"Surveillance. I need eyes everywhere. Cameras on the exterior, motion sensors on the tracks, radar for the skies. I need to know if a horde is coming before they smell us."

He stopped at the connection between the second and third carriages. He placed his hand on the cold steel.

"And defense," Seven’s eyes glowed with a dangerous light. "Automated turrets. Sentry guns. Maybe a drone bay on the roof."

He smiled. A genuine, terrifying smile.

"But why stop there?"

He looked at the vast empty space of the third carriage's rear section.

"If I'm going to spend the rest of my life on this train, I'm not going to be bored."

"A master bedroom," Seven planned, visualizing the layout. "King-size mattress. Soundproofing."

"A bathtub. Hot water. A luxury in hell."

"And here..." He pointed to a corner. "An entertainment zone. I have terabytes of movies and games on the server I scavenged. A 4K screen. Surround sound."

Seven’s eyes grew brighter and brighter as the vision took shape.

Most survivors were worrying about their next meal. Seven was worrying about his frame rate.

"The apocalypse isn't a prison," Seven whispered, his hand clenching into a fist of blue energy. "It's a sandbox. And I'm going to build the best damn castle this world has ever seen."

Life, ironically, was starting to look up.

[End of Chapter 6]