Backstory: The planet of Aoi is a planet that has been a place of desolate sand for over 20,000+ years. There is a group of people who have lived there for centuries and have learned to live with it after being sent there for punishment. The people of Cāfiki are new to the planet, and try to obtain the tiny shards of blue diamond in the sand. But there is also giant sand worms that find people based on sound, as they can hear steps through the sand.