The action takes place in a near-future world. High school girls compete in teams in tandem jet ski races. The racers have their roles: the Jetter steers the jet, while the Shooter attacks their opponents with a water gun.
Rin Namiki whose mother was a legendary Jetter, moves from the countryside to Asakusa, Tokyo in order to pursue her racing dreams. There Rin meets Misa Aoi. Soon they form their own team called Kandagawa Jet Girls.