Genki Kawamura, a renowned author and filmmaker, has adapted the Japanese horror game Exit 8 into a psychological thriller film. The game, created by a lone coder in Kyoto, features players trapped in an endlessly looping Tokyo subway station, where they must identify anomalies to escape. Kawamura was inspired by the game's design and the unique narratives created by players. In the film, he expands this concept into a story about a commuter who, after ignoring a crying baby, finds himself in a deserted subway tunnel following alarming news from an ex-girlfriend. The film explores themes of guilt and alienation, reflecting on modern society's detachment from reality. Kawamura likens the subway corridor to purgatory, where characters confront their inner fears and choices. This adaptation is part of a broader trend in indie horror that delves into the unsettling nature of liminal spaces, drawing on the internet's creepypasta culture, particularly the concept of The Backrooms.