planetarian ~the reverie of a little planet~
Planetarian: The Reverie of a Little Planet is a Japanese post-apocalyptic visual novel developed by Key and suitable for all ages. The story revolves around a middle-aged man who comes across a malfunctioning robot in a dead city. The man, simply called "the Junker", stays with this robot for a while and tries to repair the projector of the planetarium where the story is set.
Story
"Why don't you come to the planetarium? The beautiful twinkle of eternity that never fades, no matter what. All the stars in the sky are waiting for you." It is thirty years after the failure of the space colonization program. Humanity is almost extinct. An eternal and deadly rain is falling on Earth. Men known as "Junkers" are scavenging goods and artifacts from the ruins of civilization. One such Junker sneaks alone into the most dangerous of ruins - a "sarcophagus city." In the middle of this dead city he discovers a pre-war planetarium. And when he enters it, he is greeted by Hoshino Yumemi, a companion robot. Without the slightest doubt, she assumes he is the first customer in 30 years. She immediately tries to show him the stars, but the planetarium projector is broken. Unable to figure out their conversation, he finally agrees to fix the projector....