Aired: Feb 28, 2009 19-year-old Aika reunites with Eri and Karen to investigate the serial disapp...
Aika Zero
Aika Sumeragi 19 years old agent has mission in girls academy the mission is to investigate about cute girls disappearing.
Episodes:
Aired: Feb 28, 2009 
Aired: Oct 26, 2009 Aika Sumeragi continues her adventures in an underwater world of the future.
Aired: Dec 28, 2009 E.T.A.I. holds Aika captive and attempts to probe her, but the tendrils are b...
