An uninhabited, sealed off city, abandoned 30 years ago after a sudden biochemical warhead strike. The deserted ruins are ruled by autonomous battle drones. And there, you meet a young woman whose name is Reverie. A member of the planetarium's help staff who continued to wait for customers for thirty years.

How long is Planetarian: Chiisana Hoshi no Yume?
When focusing on the main objectives, Planetarian: Chiisana Hoshi no Yume is about 3 Hours in length. If you're a gamer that strives to see all aspects of the game, you are likely to spend around 4 Hours to obtain 100% completion.