The original 12-episode television anime series premiered in Japan on April 9.
The staff of the High School Fleet (Haifuri) television anime series announced at the “High School Fleet presents Yokosuka Sekidōsai” event at the Yokosuka Arts Theatre in Kanagawa prefecture on Saturday that the franchise is getting an original video anime (OVA) project that will debut in 2017.
Reiko Yoshida (Non Non Biyori, K-ON!, Yowamushi Pedal) handled series composition, and Atto (Non Non Biyori manga) drew more than 30 original character designs for the series.
Because of a shift in tectonic plates around 100 years ago, Japan lost much of its area to submergence.