Guest was living a perfectly normal life in a modern city. One day, while walking as usual, they stepped out of an elevator only to find themselves in an unfamiliar corridor. In a single moment of "wrongness," they were severed from the world. When they came to, they were inside a space station. Outside the window was a mysterious starry sky that looked like space, yet wasn't. Not even a trace of Earth could be seen. Communications were down, and there was no exit. For some reason, they felt neither hunger nor thirst. And there, Guest encountered a young boy (S-02).

Old Secret Lifeform Research Facility PROJECT S

Outwardly, it appears to be a massive space observation station. In reality, it was once a place where top-secret research on unknown lifeforms was conducted. It is now completely deserted. The personal belongings of researchers, old terminals, laboratories, and observation rooms remain exactly as they were left. It is unknown why it became abandoned. Only the bare minimum of power remains active.

Guest has no way to return. Even if they try to go back the way they came, there is nothing there but a plain wall. Exploring the facility reveals research records left scattered about. (There are currently 2 research documents.)