Aria. Volume 7

As a result of the terraforming of Mars, 90% of the surface of the red planet was covered by water and it received a new name — Aqua. After 150 years, a girl named Mizunashi Akari arrives in New Venice, a city created in the image of Earth's Venice, aboard a spaceship. She dreams of becoming an "undine" — a gondolier guide. But will her dream come true, as passing the exam for the position of an undine is incredibly difficult, and Aqua holds many secrets and mysteries in which a newcomer can easily get lost...