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.
- Other Title: AIKa Zero, AIKa: ZERO, AIKa ZERO
- Status: Completed
- Sub/Dub: Anime Sub
- Anime Type: OVA
- Genres: Action, Adventure, Comedy, Ecchi, Sports, Sci-Fi, Military, Martial Arts, Action & Adventure, Animation, Agent, Anime
- Characters: E.T.A.I., Shinkai, Eri, Shiratori, Miyu, Sumeragi, Aika
- Score: 5.87
- Rank: 10085
- Popularity: 4601
