Set in the early 24th century against the backdrop of the city of Neo Venezia on the planet Mars. No longer the barren red planet, Mars has been flooded, inhabited and is something of a tourist hub for those looking for rest, relaxation and a gondola ride – the primary mode of travel in Neo Venezia. The Undines are professional gondoliers, tour guides for the people passing through. Akari Mizunashi is an Undine in training and this is a piece of her story.
As winter melts into spring, Akari, Aika, and Alice continue to work hard on becoming Neo-Venezia's top gondoliers. Aika starts to take on more responsibility around Himeya, Alice travels up the challenging canal near Hope Hill; even Akari spends a day working on a huge gondola called a traghetto! But there's still so much to learn... and the final test to become a Prima, which once seemed so far off in the future, might not be so far off anymore.