Aria. Volume 1

The action takes place on Mars in the year 2301, when 90% of the surface has become covered with water, and the planet has been renamed Aqua. A girl named Akari Mizunashi arrives in the aquarium city of Neo-Venezia hoping to become an undine. She gets a job at the Aria company, where she hones her skills and tries to adapt to the leisurely life on Aqua.