Synopsis:

It is the year 2301. Man has terraformed Mars into a beautiful water planet, and has renamed it "Aqua". Built upon it is Neo-Venezia, an exact replica of old Venice, with beautiful waterways, palaces and plazas. Akari Mizunashi, a 15 year old girl arrives from Man-Home (formerly known as Earth) to become a gondolier trainee at a company called Aria Company. The company is lead by Alicia Florence, one of the three best gondoliers, also known as the three Water Fairies. Trough hard training, Akari aims to become a Prima herself. Many encounters and mysterious events are sure to follow on this planet of miracles.

公元2301年，经过未来科技的改造，人类成功将一颗蛮荒的行星改造成为充满水的“水星”，名了“Aqua”，随着源源不断到来的移民，Aqua开始变成 了繁华的旅游城市，在这里有着一种专门由女性担当的职业——水之领航员，她们划着小船，带领游客四处观光。15岁的女孩水无灯里怀抱着对水之领航员的向 往，从遥远的地球来到了Aqua的旅游圣地之一的新维内茨亚市，立场要成为一名优秀的水之领航员……