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.
| Title | Time | |
|---|---|---|
| 1 | White Knights | 2009-03-01 |
| 2 | E.T.A.I. | 2009-10-26 |
| 3 | Zero | 2009-12-29 |
