In her latest adventure at 19 years old, Aika finds herself entangled in a mysterious phenomenon unfolding at a prestigious girls' academy. The campus is plagued by a series of abductions targeting the most attractive students, who inexplicably vanish after joining a peculiar club. Witnessing one such abduction while airborne, Aika becomes embroiled in the enigma when she's unexpectedly targeted herself. Rather than deterring her, the incident piques her curiosity, especially when her former comrades from R-16 decide to probe the unsettling occurrences. Filled with thrilling action and signature risqué moments, Aika's journey delves deeper into the sinister forces at play behind the facade of the academy.