Place in the early century against the backdrop of the city of Neo-venezia on Earth Mars. The bare planet, Mars was bombarded, inhabited and is certainly something of a tourist hub for people who are trying to find relaxation rest and a gondola ride -- the mode of travel in neo-venezia. Even the Undines are tour guides for the people passing through, professional gondoliers. Akari Mizunashi is an Undine in training and this is a slice of her own story.