|Original Airdate||July 5, 2009|
|Next Episode||Agent Aika|
Each episode deals with Aika mysterious power "Zero".
Howaitonaitsu 「ホワイトナイツ」 2009-07-05 Premiere date on TV. 2009-08-25 OVA release on DVD & BD
- Aika Sumeragi: The protagonist, now 19 years old.
- Kana Shiraishi: Second-in-command under Miyu.
- E.T.A.I.: Mysterious girl with some connection to aliens. Acts as Miyu's bodyguard.
- Karen Minamino: Works at a maid cafe. Has little to no concept of personal space.
- Eri Shinkai:Tagging along for the adventure and provider of equipment.
- Neena:Attending the school under her brothers orders.
- Risako Nagisa: Now back to teaching ang watching over Karen.
- This is the only season of Agent Aika which includes full bath scenes. This is also the only season which includes intentional jiggling breasts, as shown in the bath scenes, Eri's breasts will constantly jiggle, and a sound effect plays when they do.