Desert 99th Desert ; Dai 9 Sabaku ; Dai-9 Sabaku ; Daikyuu Sabaku ; Desert 9 ; 第9砂漠

Hyudra, living water that attacks moving humans. A thousand years ago, a large war had ravaged the land and turned most of the world into desert, driving humans to hunt Hyudra for water. In total, there exist eight deserts. The story focuses on Mao as he heads to the phantom ninth desert to find his father.