The premise
Anomaly Zones appear in Japan without warning. They are spaces where the normal rules stop applying: the official material describes an apartment complex with inverted gravity, a hallway that twists and moves, and a shopping street that keeps multiplying.
Reona Minazuki is 17 and works as a Diver for the Anomaly Zone Countermeasures Office. Her reason for entering the zones is personal: Arisa Kato, her closest friend, disappeared inside one.
What happened at the mall
The official character files say the two were visiting a mall when it anomalized. They were separated, and Reona survived thanks to a detail the site redacts. After that, she joined the Countermeasures Office and began diving by choice.
A young girl also appears in that backstory: she was with Reona and Arisa in the mall and went mute after witnessing her parents killed by Anomalies. The official site lists her only as “Girl”, with no voice actor named.
Tone and spoiler policy
The game is framed as anomaly horror inside a survival shooter: liminal spaces, Showa-era retro atmosphere, and hostile creatures called Anomalies. The official genre label is action adventure × anomaly exploration.
This archive avoids story spoilers beyond what the official site and store pages already reveal. If a page discusses late-game material, it will say so at the top rather than hiding it mid-paragraph.
Anomalith Archive. “Story and setting: the zones, the mall, and the missing friend.” Last updated 2026-10-29. https://anomalith.net/lore/story/