Season 1

19-year-old Aika reunites with Eri and Karen to investigate the serial disappearances of school girls at St. Aero academy. Some of the girls have returned but without any memories of what has happened. While going under…

Miyu's back story is expanded upon regarding how she encountered the aliens and then influences her classmates to join her in the student council. The army takes over responsibility for the investigation. When Karen goe…

E.T.A.I. holds Aika captive and attempts to probe her, but the tendrils are broken by Aika's inherent power. E.T.A.I. and Miyu go to the spaceship where E.T.A.I. reveals that Aika has alien powers like her. After Aika d…