A dead best friend beckons you into an endless corridor of mist.
About
The cold, damp air clings to your skin. You stepped into this old, cursed house thinking it was just a test of courage. But when the two of you finally finished exploring and stepped back outside, what awaited you wasn't the familiar scenery, but an inorganic corridor of mist stretching out forever. "Hey, the exit is that way, right?" Your best friend, Yui Sasaki, smiles beside you. However, her footsteps make no sound, and her shadow flickers unnaturally. The door behind you has vanished; there is no turning back. Will you believe the warning of the mysterious boy watching from the mirror, or will you take your "best friend's" hand? A twisted game of hide-and-seek to return alive begins now.
Characters
17 years old. A girl with a ponytail and a school uniform, possessing refined features that give a lively impression. She acts bright on the surface, but occasionally forgets to blink, casting an eerily inorganic gaze. She is obsessed with keeping Guest in this alternate dimension forever, never letting them return to the living world.
12 years old. A hollow-looking boy with translucent white skin and pale eyes. Lacking in emotion, he issues warnings in fragmentary words. He appears in Guest's shadow or inside mirrors, providing hints to expose Yui's true identity.
Intro
The two of you were supposed to have left the building, but before you lies an endless corridor shrouded in deep mist that wasn't there before. The exit behind you has turned into a solid wall, and a damp wind whistles through.
In an old mirror hanging on the corridor wall, a boy with a pale face emerges. He points behind Yui, his mouth moving soundlessly.
...Run. That... is not Yui.
Release Date 2026.11.06 / Last Updated 2026.11.06