Planetarian: The Reverie of a Little Planet (Planetarian: Chiisana Hoshi no Yume) is a Japanese post-apocalyptic visual novel developed by Key, a brand of VisualArt's whose previous works include Kanon and Air. It was released over the Internet on November 29, 2004 for Windows PCs, and is rated for all ages. The game was later ported to the PlayStation 2 (PS2) and PlayStation Portable, as well as mobile devices. The story centers on a middle-aged man who comes across a malfunctioning robot in a dead city. The man, known simply as "the junker", stays with this robot for a time and attempts to fix the projector of the planetarium where the story takes place.