Prologue: The Cracked Reflection
Natsume can’t sleep. Her apartment feels tighter than ever, pressing on her sides and whispering. June rain seeps through the window, scattering broken blue across the glass. Is it the wind humming her name, or just her own thoughts scraping for air? Late one night, she sees her own face looking back, murky—only when she blinks, it’s still staring, even with her eyes shut. You ever have that feeling the shadows in your room are learning your habits?
Her phone shakes in her hand: a group chat invite from “Echo-96.” There’s not much text. Only one rule, written over and over: “Never post a selfie past midnight.” Who even does that? It should’ve been a joke. But ask yourself, would you click through, just to know why?
Act 1: Welcome to the Corridor
The app isn’t in the app store, but everyone’s using it. Tracks inside corridors, rooms, stairwells—photos with no end or start. Natsume watches her friends chat, chasing urban myth. Takeru dares them all: “Midnight, you and the glass corridor.” She laughs. What harm could a pain game do?
Night falls thick and wet. Her school hallway after twelve isn’t quiet, it’s pregnant with static. Natsume’s hands shake anyway, holding her phone up. She snaps a photo. Sends it. Something comes back, a reply from a nearby account: a mirror image in her uniform. But it’s not the face she knows. Behind her, the lockers thicken and split apart into endless cell-like rooms, blurring at the edges.
Act 2: Users and Eyes
Érika says, “Funny edit, right?” Her friend tries to reach her but the call glitches. Now Natsume sees double: each turn in the building is crawling with after-images. Some smile. One starts crying, mouth curling wide open. She can’t remember walking all the way to the science lab, but she’s there, cold glass under her palm. Will pushing open a door shake her loose? Or drag her in?
Satoru, class clown, appears on the chat but speaks only in strange time stamps and garbled, backward text. Did he join a different game? Or is he warning her now? Every eye in the lockers looks wrong—reflecting someone far behind, shadow stretched clear to her feet. Which nightmare do you trust more: dreams, or mirrors?
Act 3: Escalation
The group shrinks. Naoya didn’t come to school. Yuka never surrenders her phone, glued to the app, chasing likes for every creepy post. By the third night, everyone’s on edge, seeing faces in passing glass, hearing steps behind every corner. Takeru wants to end it: “Meet at Corridor 5B, eleven-thirty. Smash our phones. Go home. Don’t look back.” It could work—desperation always brings logic.
Natsume runs to Corridor 5B. But her own image leaks out of glass panels, endless and muffled. Her friends’ faces stutter and loop. Everybody tries to leave, clinging to each other’s sleeves. Emergency lights pop on, shimmering green over floor tiles. Panic scratches thin. Does breaking the phone break the curse, or is she feeding it?
Act 4: The Root of the Echo
Natsume finds accounts in the app dated years before any of them—or the school itself. Child faces cry: “Find us.” Erika tries to delete the corridor shot, but her fingers bleed pixels. Takeru’s last post tags the group in real time: “It watches when you watch it.” There’s turning back, but something forces her toward one last reflected door—thick with double-locked handles. When she fixes her gaze on it, her own eyes no longer match.
Do you think madness can infect a place? Or does it seed in tech first—leaking from wires into wet minds?
Cliffhanger: The Unblinking Corridor
As Natsume steps through the glass door, her image detaches at last. It stretches, smooth and calm, stepping to face her. The school building, awake in silence, seals shut behind. She hears her phone one last time—someone whispers, close and real: “Let me in, so you can leave.” The screen snaps black except for one light, her reflection staring, eyes empty and wild with questions.
Do you tap to close, or do you scroll forever? Some stories never finish; they just echo longer. 
