Aika's story continues; she is now 19 years old, three years older than in R-16 and seven years younger than in Agent AIKa. Strange phenomena have been occurring at a girls' academy. Slowly but persistently, the cutest and most beautiful girls are joining an internal club, but instead of signing in, they are simply abducted by a strange being that takes control of them through some indecent means. By coincidence, Aika was flying by in her plane when one of these abductions occurred. She was attacked to prevent her from coming closer, but instead of repelling her, she became intrigued by the attack's origin. Then the opportunity arose when her late partners from R-16 decided to investigate those abductions. The story remains full of action and panty flashing, which are a must in the Aika series.