sums it up quite nicely, here's a bit more:
It is a WONDERFUL, yet pleasant time on a terraformed Mars renamed to AQUA. The Undines of the city act as tour guides and taxis; showing tourists the beautiful landmarks of NEO-VENEZIA such as the Bridge of Sighs and Marco Polo station. The story follows Akari Mizunashi in her journey to become a Prima Undine along with her fellow Single, Aika S. Granzchesta, and prodigy Pair, Alice Carroll. The three juniors goes about their daily practice that range from the mundane ordinary to some truly EMBARRASSING situations. All the time they are supervised by three TOTALLY cool Prima seniors: Alicia Florence, Akira E. Ferrari, and Athena Glory. As the silent cruise through the waterways relaxes your body and mind, I'm sure at the end of the day you'll go "My, my!"
So, if you're in the mood for:
1. Episodic show (slice-of-life)
2. Sci-Fi Venice
3. training for a hospitality occupation
4. occasional ventures into the surreal
5. cats, loads of fucking cats
6. ultra long scenic routes
then it should be alright.