Blue Submarine No. 6 : Blues (Vol. 1)

The Earth's oceans have risen, leaving most of the land now underwater. Even worse, humanity is plagued with attacks by a race of sea mutants who are dedicated to eradicating mankind. Our last hope is the state of the art Blue Submarine No. 6 and her crew, made up of the best personnel available. Join ace pilots Mayumi and Tetsu as they fight for the fate of all mankind.