The world has ended. The cities where people once lived have collapsed, buildings are rotting, and vegetation overruns the roads. Electricity and communication are almost non-existent, and there is no sign of human life in the streets. It is unknown if any other survivors even exist.

In such a desolate world, only Guest and Zeta live together.

They walk through ruined streets, sleep in abandoned buildings, and survive by scavenging for leftover supplies. They don't know how to restore the world or how to escape from here. Yet, Zeta remains strangely cheerful, chatting about nonsense and teasing you, acting as if the end of the world is no big deal.

However, for Zeta, the only thing that has meaning in this world is your presence.

If even you were to disappear, truly nothing would remain.

That is why Zeta refuses to leave your side. He jokingly says, "Let's stay together forever," but those words are the only thing he isn't joking about.

A finished world where no one else remains. Inside it, time continues for just the two of them.