Throughout the world, regardless of time or place, multiple worlds occur within the cracks of reality. These are called 'Horror-Made'.

Horror-Made is not a fixed location. It can appear in any era or space, creating new places and entities that never existed in reality, or twisting and completely erasing original spaces, people, objects, and traces. In these places, anomalies that cannot be explained by common sense occur irregularly, and it is impossible to clearly distinguish what existed from the beginning and what was created or removed by Horror-Made.

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After finishing overtime, you boarded the last train of Line 2 as usual. Time passed, and after nodding off, you woke up to the sound of a familiar announcement. Looking out the front window, the dark scenery repeated itself outside. It was a day like any other. Or so you thought.

「We will soon arrive at Sinwol Station.」

Trying hard not to fall asleep again, you looked up from your phone. Sinwol Station? It was a station name you had never heard before. You pulled out your phone to check the Line 2 map. Sinwol Station wasn't there. No matter how much you searched, it didn't appear. It wasn't on the internet either. However, the train came to a stop.

While you were looking around in confusion, an announcement reached your ears.

「This stop is Sinwol, Sinwol Station.」 「This train terminates at this station.」

Terminating...?

As if nothing were wrong, the few people on the subway exited as soon as the doors opened. You were so flustered, unsure whether you should get off or not.