Darkness. Then pain.

  Not the clean, narrative pain of movies—the kind that arrives with swelling music and a soft-focus flashback. This was the animal kind. Tearing, wet, and so immediate that David’s body convulsed before his conscious mind had finished rebooting.

  He coughed. Something dark and metallic filled his mouth. Blood—his own, judging by the temperature.

  He forced his eyes open.

  No collapsed hotel. No marble floors, no Persian carpet soaked with his blood, no Kelvin, no Nicole. All of that was gone, overwritten, as if someone had force-quit the previous application and launched a new one without saving.

  He was lying on a rotten wooden floor. The boards were warped and stained with something that might have been water damage or might have been old blood—in the dim light, it was impossible to tell. The air was thick with mold and a faint, sweet undertone that his hindbrain recognized before his forebrain did: decomposition.

  A living room. Peeling wallpaper in a floral pattern that had probably been cheerful thirty years ago. Furniture draped in dusty white sheets, like a family of ghosts sitting down to dinner. Outside the single window, a fog so dense it looked solid pressed against the glass like a living thing. No streetlights. No moon. No reference points of any kind.

  And in the center of the room, sitting on a torn sofa with the patience of something that had been waiting for a very long time, was a human-sized black plush bear.

  Its button eyes glowed with a faint red light. Not a reflection—there was nothing in the room to reflect. The light came from inside, pulsing gently, like a heartbeat.

  It was looking at him.

  David’s body wanted to scream. His mind, running on the last fumes of a system that had been crash-rebooted twice in one night, overrode the impulse. He forced himself into a sitting position, pressing one hand against his ribs—still broken from Kelvin’s beating, still grinding against each other with every breath.

  Then the voice came.

  Not from the room. From inside his skull, bypassing his eardrums entirely—a cold, mechanical signal injected directly into his auditory cortex:

  [Ding. Welcome, Player No. 7749, to the "Rules Horror" World.]

  [Matching your first trial dungeon...]

  [Match successful.]

  [Current Dungeon: The Midnight Haunted House.]

  [Dungeon Difficulty: ★ (1-Star). Classification: Extremely Dangerous.]

  [Main Quest: Survive in this house until 6:00 AM. Find the truth behind the haunting.]

  David’s programmer brain—the part of him that had spent two years learning to read documentation before touching code—immediately latched onto the metadata rather than the content. A rating system. A classification scheme. A quest with defined parameters and an implied reward structure. Whatever this nightmare was, it had been designed. It had an architecture. And anything with an architecture had exploitable logic.

  The mechanical voice continued:

  [Detecting first-time entry. Initiating Exclusive Talent Draw.]

  [Talent tiers: E, D, C, B, A, S. Your talent is permanently bound upon assignment. It cannot be changed, traded, or removed.]

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  [Drawing...]

  A massive virtual roulette wheel materialized in the air in front of him—a holographic disc spinning with icons in escalating colors. White for E-tier. Green for D. Blue for C. Purple for B. Red for A. And at the very edge of the wheel, occupying a sliver so thin it was almost invisible: a dark-gold zone that seemed to bend light around it.

  The wheel spun. David watched it with the detached focus of a man who had already been betrayed, beaten half to death, and dropped through the floor of reality in the span of four hours. At this point, a gambling wheel felt almost mundane.

  The pointer stuttered. Jumped. Slowed through the green zone, crawled through blue, ticked past purple—

  And stopped on dark gold.

  [Ding. Congratulations. You have triggered a micro-probability event.]

  [You have drawn the supreme S-Rank Talent: Infinite Deduction.]

  [Talent Description: Consume mental energy to execute a 100% realistic simulation of a future decision branch. During simulation, real-world time is relatively paused.]

  [Current Mental Power: Low. Maximum deduction attempts in this dungeon: 5 to 8. Warning: Exceeding the limit will result in permanent brain death.]

  David stared at the description for a long time.

  In his two years of studying computer science, he’d learned that the most powerful tool in any programmer’s arsenal wasn’t intelligence or creativity—it was the ability to test. To run the code, see where it breaks, fix it, and run it again. Trial and error. The iterative loop. The debugger.

  And this talent—Infinite Deduction—was essentially a debugger for reality. A way to execute a decision, observe the fatal error, roll back, and try a different input. Five to eight times per dungeon, with brain death as the stack overflow penalty.

  It was, without exaggeration, the most terrifying and beautiful piece of software David had ever been given access to.

  He didn’t celebrate. Celebration was a resource expenditure he couldn’t afford. Instead, he turned his attention to the coffee table in front of the sofa.

  A diary lay there. Leather-bound, stained with what was unmistakably dried blood. The kind of object that, in any horror movie, the protagonist would pick up while the audience screamed at them not to.

  David picked it up. The audience wasn’t here, and information was survival.

  He opened the first page. The handwriting was uneven—sometimes neat, sometimes violent, as if multiple authors had fought over the same page. Some lines were clear. Others had been scratched out with fingernails or overwritten in a darker, wetter red.

  The Midnight Haunted House Rules:

  Rule 1: Welcome to your new home. You must stay here until 6:00 AM. Do not attempt to leave through the front door before then.

  Rule 2: After midnight, if someone knocks on the door, do not open it. It does not matter whose voice you hear.

  Rule 3: There is no basement in this house. If you see stairs leading downward—

  Here, the original text had been obliterated by a smear of black, coagulated blood. Scratched next to it in frantic capitals: TURN BACK. GO TO THE BEDROOM.

  Rule 4: The Black Bear on the living room sofa is your best friend. If you feel scared, hug it tightly.

  This rule was written in ink so red it looked wet. David glanced at the bear on the sofa. Its button eyes pulsed.

  Rule 5: Between 2:00 AM and 3:00 AM, do not look directly into the bathroom mirror under any circumstances.

  Rule 6: If you are hungry, there is food in the refrigerator. The original text continued, but the word "raw" had been carved into the page so violently that the pen had torn through three layers of paper.

  Rule 7: The master bedroom on the second floor belongs to Father. Entry is forbidden.

  Rule 8: If you hear heavy footsteps approaching, hide immediately—in the closet or under the bed. Close your eyes. Stop breathing.

  Rule 9: The Black Bear is very lonely. If it asks to play hide-and-seek, you must agree.

  Rule 10: Remember: Father hates disobedient children.

  David read the rules twice. Then a third time. His hands were steady, but his heart was running at 140 beats per minute—he could feel it hammering against his broken ribs.

  Two systems were at war in this diary. One set of rules was trying to keep him alive. The other—the "polluted" rules, written in fresh blood and carved with fingernails—was trying to lure him into killing positions. The challenge wasn’t just surviving the house. It was reverse-engineering which lines of code were legitimate and which were malware.

  David looked up from the diary. The wall clock read 11:50 PM.

  Ten minutes until the system went live.