In the future — in a world mostly submerged under water — the 19-year-old Sumeragi Aika goes to college while training as an agent by assisting in Aida Gozo's salvaging business.
Ami Koshimizu
Sumeragi Aika (voice)
Miyuki Sawashiro
E.T.A.I. (voice)
Misato Fukuen
Shinkai Eri (voice)
Mikako Takahashi
Shirakiku Rin (voice)
Mamiko Noto
Minamino Karen (voice)
Akio Otsuka
Gozo Aida (voice)
Asami Shimoda
Shiraishi Kana (voice)
Naoko Suzuki
Nagisa Risako (voice)
