Rayn already knew the real secret code. Hearing that, both the Hacker and Haarun were literally stunned — completely in disbelief.

  The Hacker asked, confused:— “How the hell can you be so sure the code’s fake? And if you already knew, why didn’t you tell us earlier?”

  Rayn replied calmly:— “Not from before… I figured it out just a while ago.”

  The Hacker spoke again, still calm but clearly under pressure:— “Alright then… What is the real secret code?”

  Rayn smirked lightly, his tone confident as hell:— “The people we killed… they were the code.”

  Haarun frowned, annoyed:— “What are you even saying, bro? Are you sure you’re making sense to yourself?”

  Rayn didn’t react. He started explaining straight-up:— “Think about it. The guys we took down — if they wanted to guard the area efficiently, they could’ve split up to cover the whole space. But they didn’t. Each of them stood in specific spots — different positions, different patterns. That’s where the real code came from: 138518.”

  The Hacker frowned deeper, skeptical:— “You could be right… but what if it’s actually 188513? How do you know for sure which one’s legit?”

  Rayn answered calmly again:— “Yeah, theoretically that’s possible. But it’s definitely 138518. And here’s how I know.”

  He turned toward Haarun and said:— “Haarun, you remember when we entered the underground metro station? That place looked like a regular entry-exit point, right?”

  Rayn paused for a second, then continued:— “If you look closely, you’ll get it — from the spot we entered, the closest location was the control room. That’s where I took one guy down. After the control room, the next closest spot was the ticket counter — and that’s where Haarun dropped three guys. So that gives us our first two numbers.”

  Rayn kept going:— “Next, from the ticket counter, the closest spot is the escalator — I took down eight people there. After the escalator comes the Maintenance Tunnel… and from there, the platform.”

  As soon as Rayn finished, Haarun blurted out in shock:— “Bro, do you have a brain or a whole supercomputer CPU in your head?”

  The Hacker added calmly:— “This is why he’s an A-Rank Warbrain. Having abilities like this is normal for him.”

  Then Haarun, still confused, asked Rayn again:— “Okay fine… but how did you figure out which spot is closest to which?”

  Rayn laughed softly and answered with full confidence:— “When I was in the control room, I looked at the entire underground metro station map.”

  After that, the whole tunnel went dead silent for a moment. Haarun looked around casually and said:— “We got the code numbers… but I don’t see any secret door or any place to enter that code.”

  Rayn thought for a moment, then said:— “Because the full set of numbers still isn’t correct.”

  Hearing that, both Haarun and the Hacker froze for a second. Haarun instantly yelled in frustration:— “You’re telling me after all that brain-breaking math we STILL don’t have the right number?!”

  The Hacker looked straight at Rayn and asked:— “If that number isn’t correct… then what’s the real number for the secret door?”

  Rayn answered calmly:— “There is no number for the secret door… Instead, there’s a code letter.”

  Both of them got hit with another wave of shock. Rayn started explaining again:— “The number we got —138518 — when you convert it to English, it becomes ‘Acher.’ And ‘Acher’ is this mafia gang’s code name.”

  Rayn realized they were still kinda lost, so he simplified it even more:— “You guys probably didn’t notice… but this whole place has letters written from A to Z. If I search for the word ‘Acher,’ each letter has roughly a 20-meter gap between them.”

  Hearing that, the Hacker spoke in a calm voice:— “So… the spot with the letter R should be where the secret door is. But… I don’t see an R anywhere.”

  Before he could even finish, Rayn pointed upward. Both of them looked up — and on the tunnel’s ceiling, a huge distorted R was painted.

  Haarun got hyped instantly and yelled:— “Wait — so the door is UP THERE?!”

  Rayn replied in a confident tone:— “Nope… the door is exactly under the R. Which means — it’s literally right under our feet.”

  Haarun snapped, totally annoyed:— “Bro, where the hell is the door supposed to be?”

  Rayn replied in that calm, steady tone of his:— “We need to destroy the entire track.”

  The Hacker asked bluntly:— “Okay, let’s say you’re right… but then how did the mafia come and go?”

  Rayn paused for a moment, then answered in a cold voice:— “They definitely had some special technique or tech — something that lets them access it without breaking the track. But we don’t have anything like that… so we’re gonna have to destroy it.”

  Both of them understood instantly. The Hacker spoke slowly, voice chilled:— “Alright… then we need to get out of the tunnel. Because I’m the one who’s gonna destroy that track.”

  The three of them stepped out of the tunnel together. But the Hacker left his drones inside — those drones were his real claws, his metal fangs.

  His eyes lit up with a cold fire. The blue hologram screens beside his head slid downward. His fingers danced across the glowing codes — and within seconds, red warning glyphs flashed alive.

  Inside the tunnel, the drones froze in mid-air, their sensors glowing like red embers — like metallic beasts holding their breath before the kill.

  The Hacker whispered:— “Fire.”

  The moment his finger stopped — hell exploded inside the tunnel.

  The drones unleashed red laser beams faster than lightning. A thousand streaks of red light fused together and ripped the entire track into pieces.

  A massive explosion roared inside. Fire blasted out of the tunnel like a storm. The heat and smoke slammed into Haarun and Rayn. The whole metro station shook — like an earthquake just hit.

  Echoes slammed against the concrete — The sound of destruction tore through the entire station like a monster screaming in the dark.

  Pipes around them burst one after another. Boiling steam mixed with flying metal shards, turning the whole scene into straight-up nightmare fuel.

  The Hacker let out a cold smile — a dark flame flickering in his eyes. His voice? Pure ice:— “The door’s open… From now on, nobody’s using this route again.”

  After a moment, the fire and smoke slowly faded. The three of them stepped back inside the tunnel.

  The moment they entered, it felt like walking into a warzone — walls cracked open, pipes shredded, tracks ripped out of place and scattered everywhere.

  But right in the middle of all that destruction, directly under the R-letter… A strange white door had emerged.

  The entire tunnel was wrecked, yet the door didn’t have a single scratch on it. It glowed softly — like destruction wasn’t allowed to touch it.

  Haarun, breathing hard, stared at it in disbelief:— “Bro… that blast was insane… how the hell did this thing stay untouched?!”

  The Hacker walked toward the door, step by step. His eyes scanned the weird patterns on its surface. Then he spoke in that flat, chilling tone:— “This isn’t a normal door. It’s a System Door. Relax… breaking this system is child’s play for me.”

  He flicked his finger and pulled the hologram screen down. Lines of code floated up silently — and his fingers instantly started dancing over them.

  Haarun leaned toward Rayn and whispered:— “He’s hacking without any connection… bro this is basically sorcery at this point. Guess being an A-Rank hacker means this is normal.”

  Within a few seconds, the Hacker stopped. Suddenly — click! The white door slowly slid open, revealing a terrifying sight swallowed by darkness.

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  Far ahead, a narrow staircase descended into a deep, pitch-black void — like an invitation to crawl straight into some unknown hell. Rayn drew in a sharp breath and whispered:— “Whatever’s down there… It's waiting for us.”

  Rayn, Haarun, and the Hacker stepped carefully, breathing tight, descending one step at a time. Inside, the air was freezing—so cold it felt unnatural.

  And the darkness… it wasn’t just dark; it felt alive, like it was swallowing the very idea of light.

  A rotten smell drifted through the air — thick, suffocating — like death itself exhaled around them.

  Halfway down, Haarun narrowed his eyes and froze. The floor was littered with bodies. And on the walls… even more corpses hung from hooks, as if some invisible hand had arranged them like decorations.

  But the most horrifying part — When Haarun stepped closer and really looked, his blood turned to ice.

  They were the same people Rayn, Haarun, and the Hacker had killed.

  Every single one. The same faces, same wounds, same broken bones… but stitched together, like someone forced them back into shape.

  Right then, the pitch-black walls suddenly erupted with light — Countless red dots flaring alive. In a heartbeat, they realized — Gun muzzle lights.

  The next second — THRAAATTTTTTT!!! Gunfire tore through the walls, a rain of bullets screaming toward them. The sound was so violent it felt like the entire stairwell might collapse.

  Rayn was the first to notice — With the bullets came figures rushing out of the dark. But the way they ran… Arms flinging, legs twisting, heads bent sideways — like deformed puppets, not humans.

  Haarun clenched his teeth and raised his sword. All around them — corpses, gunfire, and chaos made of dead bodies. Rayn whispered in an icy tone:— Welcome to hell…

  The three of them moved at near sound-speed, dodging through the bullet storm. Every shot sliced past their bodies, smashing into the walls and bursting into sparks.

  The Hacker had already stepped back and carved out a tiny safe zone in one shadowy corner. Two hologram screens floated beside him — streams of green, red, and blue data rushing past like digital rivers.

  One hand was hacking the system without blinking, and with the other he was controlling ten drones at once — like it wasn’t a human hand at all, but some demonic magic.

  The drones roared awake. Their eyes flashed blood-red, and in seconds they swarmed beside Rayn and Haarun.

  Laser beams tore through the storm of bullets — every shot turned to ash mid-air before it could touch Rayn or Haarun. With that protection, they might as well have been immortal warriors in a battlefield.

  Rayn didn’t waste a single breath. His body moved like a shadow — in one smooth blur, his blade sliced across four mafia throats. Before a blink could land, four heads spun off into the air, and a flood of blood hit the ground like rain.

  Haarun gave a cold grin, twirled his sword, and charged forward like a streak of fire.

  Drones spun overhead — cutting bullets, firing lasers — smoke, sparks, and blood mixing into a demonic storm of light.

  Haarun shredded through mafias at sonic speed. He split one straight down the middle — the body clapped apart and crashed into the ground.

  But weirdly — not a drop of blood spilled.

  Instead, a thick, black, acidic liquid sprayed from the cut. The moment it hit the floor — ssssssss — smoke billowed up, and the concrete melted into pits.

  Haarun froze. Panic flickered in his eyes for the first time. Rayn looked up… and finally saw it clearly — The ones they were killing… weren’t normal mafias at all.

  Bullets didn’t make them scream. Their eyes were empty. Their lips were stitched shut. Their entire bodies were covered in thick stitch marks — like someone had chopped them up and stitched them back together again…

  A whole crowd of grotesque, reassembled puppets built for killing.

  Rayn’s breathing grew heavy. He whispered:— “These… aren’t mafia. They’re not even alive… They’re victims of experiments.”

  At that exact moment, Haarun suddenly got it — These monster-like corpses weren’t trying to kill Rayn. They were all rushing at him with one single obsession:

  They wanted his mask.They weren’t aiming at his neck, chest, or heart. They were clawing straight at his mask — fingers digging in, trying to rip it off, like their entire mission would be “complete” the moment they exposed his face.

  A cold bolt of fear flashed in Haarun’s eyes. He clenched his teeth and whispered:— “Rayn… they don’t wanna kill you. Their only target is your mask.”

  Then he roared at the top of his lungs:— “Hacker! Don’t let a single one of them touch his mask!”

  The Hacker nodded sharply:— “Got it.”

  Rayn and Haarun exchanged just one glance — That was all they needed to understand. If they delayed even a second, it was over.

  In the next heartbeat, they lunged forward like wild predators birthed from the dark.

  Blades flashing, movements inhuman — flesh, bones, and stitched-up skin tore apart under their strikes.

  Heads flew. Arms dropped. Bodies split open and collapsed like broken mannequins. In the blink of an eye, the whole area turned into a melted nightmare of carnage.

  After a while, the flow of twisted mafias finally stopped. The Hacker commanded his drones to stand down — and for the first time, silence settled over the battlefield.

  Rayn and Haarun stood still, surrounded by a hundred disfigured corpses. But not a single drop of blood.

  Instead, their bodies leaked thick, black acid. The moment the acid hit the ground — ssssss — smoke hissed upward, and the stench choked the entire space.

  And thenb— from that acid began to rise a strange kind of gas. Thick, Black, Sticky, like a poisonous fog.

  The moment it brushed against skin or the mask, it felt like it could burn the lungs from the inside.

  Rayn gripped his mask tightly and whispered into the darkness:— “This is why they were trying to rip our masks off… This gas is a hundred times deadlier than king cobra venom.”

  Haarun flinched, fear shaking in his voice:— “If they had managed to rip our masks off… we wouldn’t survive ten seconds.”

  Right then he looked around and froze:— “Where the hell is Hacker?!”

  Rayn and Haarun spun around — and both of their chests went cold.

  Hacker was standing there, but the black gas was curling around him like something alive. His eyes glowed with a strange light — as if some hidden system inside him had awakened. Neither Rayn nor Haarun loosened their masks for even a second.

  As the toxic fog slowly thinned, they saw — The hacker was completely fine. Rayn’s icy voice softened just a bit:— “Good. You look normal. That’s what matters.”

  Haarun let out a shaky breath:— “Bro, I seriously thought… you weren’t gonna make it.”

  But Hacker’s voice brought the fear right back:— “If this suit wasn’t on me… I’d be dust by now. I’ve never seen gas like this in my life.”

  A flicker of pure terror crossed his eyes. Haarun felt that fear stab straight into his chest. Rayn spoke quietly — calm, but hard as steel:— “Standing here is suicide. Move.”

  They sprinted. Through the dark pit, past the stench of gunpowder and bodies half-melted by acid — they ran faster than sound.

  Haarun led the charge, his blade flashing like streaks of fire. Anything that moved in front of him hit the ground in two pieces.

  Rayn stayed at the back, eyes never leaving the shadows. Every suspicious sound was sliced apart like lightning ripping through air.

  Hacker ran between them, his fingers dancing across holographic screens mid-sprint. Every gate broke open in seconds, every camera blinked once and died. The entire system had no clue what level these three had just infiltrated.

  Above their heads floated Hacker’s drones — watching like the angels of death.

  Incoming bullets exploded midair, turning into dust before touching them.

  But even as they ran, the air in the tunnel whispered:— “This is only the beginning…”

  Rayn suddenly stopped. His eyes narrowed in a way that wasn’t normal. Haarun and Hacker halted instantly — because they knew one thing:— if Rayn stopped like that, something seriously off was waiting ahead.

  Rayn stood still with his eyes closed, listening… breathing… Letting the tunnel go dead silent around them.

  Then he opened his eyes and stared at a side door. In a cold, quiet voice, he said:— “There’s something inside this room.”

  Without a single question, Hacker popped up his hologram. A few seconds of scanning was all he needed:— “This door… isn’t like the other gates.”

  His fingers raced across the virtual keyboard. After a couple of sharp electronic beeps, the door slowly slid open.

  The moment it cracked, a damp, rotten smell seeped out. They looked inside — and all three froze.

  Inside the dark chamber were hundreds of girls, chained with broken iron restraints. Age: sixteen to twenty. Bodies thin like bones, faces pale from months of starvation.

  Some eyes were filled with raw fear, some empty and hollow, some cracked with dried tears and bleeding lips.

  The room was eerily silent, No guards, No noise, Just the trembling echo of weak breathing.

  Haarun’s hand tightened around his blade. In a low voice, he whispered:— “They look like… Commoners. Probably abducted from villages.”

  Hacker’s voice shook:— “But… Why would they gather this many girls? What’s the real plan here?”

  Rayn’s jaw locked. Cold fire burned in his eyes:— “Whatever the reason is… Our job is clear. We get them out alive.”

  The three of them exchanged a long, heavy look. The tunnel felt even darker, as if an unseen shadow was watching them.

  Then — Every girl in the room turned their gaze toward the three. Their bodies trembled, eyes filled with terror so sharp it was as if Death himself had walked in. Their lips trembled, trying to scream — but their throats were so dry no sound came out.

  Rayn stepped inside slowly. His eyes calm but unreadable, his voice soft, almost warm:— “Don’t be scared. I don’t know how they brought you here… but one thing is certain — getting you home is our responsibility now.”

  His voice spread through the room like a quiet spell. Hope flickered back in the girls’ eyes — fragile, but real. Rayn’s words settled into them like something they had to trust.

  Rayn, Haarun, and Hacker quietly began unchaining them, one girl at a time. Most of them couldn’t even stand, legs trembling like threads — but slowly, shakily, they began walking with them.

  Haarun and Hacker were leading the way. Rayn stayed at the very back — like a hunter tracking prey, eyes scanning every shadow, every sound, every tiny movement.

  And then — The ground shook. From the darkness of the corridor, hundreds of half-dead mafias limped forward. Black masks covering their faces,

  weapons in their hands, rotting bodies barely holding together — but their eyes burned with a wild, blood-red madness.

  The girls froze — and then suddenly they all screamed together. A piercing, bone-rattling scream that echoed through the tunnel like the cry of trapped ghosts.

  Haarun didn’t waste a single second. His eyes lit up with a crimson glow. With a furious roar, he lifted his sword and charged.

  His first strike split eight mafias clean in half. Acid splashed across the corridor floors.

  But even as he cut them down, Haarun realized — they weren’t stopping. They kept coming, crawling, staggering, dragging themselves forward.

  He clenched his teeth and muttered:— “Their strength… feels like Rank D. Even though I'm having trouble cutting through them…”

  Suddenly he spun back and yelled:— “Rayn! Hacker! Take the girls and move! I’ll hold this place!”

  The hacker froze:— “But—” Haarun’s eyes flared even brighter in the dark. His sword, soaked in acid and black blood, rose again as he roared:— “Just listen! Get them out NOW! One second late and everyone dies!”

  Rayn paused for only a heartbeat. Then in an icy, emotionless voice, he said:— “Go.”

  Hacker swallowed hard and sprinted down the other passage. The girls trembled as they followed, looking back over their shoulders — as if the figure standing in the darkness wasn’t Haarun anymore… but a bloodthirsty beast. Haarun leapt back into the horde, alone against an entire army.

  The corridor filled with nothing but — the screech of slicing steel, the roar of a lone warrior, and the sizzling hiss of black, acidic blood eating through the floor like fire.