Hoshi no Hito

Planetarian Drama CD "Hoshi no Hito"  is a  drama CD  based on the  Planetarian: Chiisana Hoshi no Yume  visual novel by Key. It was first released on July 27, 2007 by  Key Sounds Label  bearing the catalog numbers  KSLA-0030—0031. The CD contains two discs each with seven audio drama tracks of varying lengths; the tracks on each disc come together to form two separate stories. The CD is an adaptation of the "Hoshi no Hito" and "Tircis and Aminte" stories from the  limited edition book. The "Hoshi no Hito" story plays like a regular audio drama with several different  voice actors  acting out the parts, but "Tircis and Aminte" is just a recited story by  Keiko Suzuki, the voice actress who plays Yumemi Hoshino in the visual novel. (Source from  Wikipedia)

Soundtrack 1

Soundtrack 2