Thirty years ago the Space Colonization Program collapsed and took most of civilization with it. Now a perpetual, lethal Rain covers the planet. Survivors called Junkers pick through ruins for anything useful. One of them finds something unexpected in the wreckage of a department store in the Sarcophagus City: a companion robot named Hoshino Yumemi, who has been standing at her post and waiting for customers for three decades. She still is. Planetarian HD is a kinetic visual novel about the Junker and Yumemi and the short time they spend together — and what it means that she kept waiting.