You want the actual AIKa Zero experience in 2-3 sentences? Here: Aika Zero exists in that specific pocket of late-2000s anime where fanservice isn't apologizing for itself and the action sequences actually care about momentum and geography. The three episodes move fast enough that the absurdity, girls being mind-controlled at an academy, Aika crashing through everything to stop it, never stops to explain itself, and it doesn't need to. You're watching someone who is genuinely good at her job do that job while everything around her is ridiculous, and that friction is the entire appeal.
Aika has grown into a seasoned nineteen-year-old operative, but trouble finds her when a private academy becomes the center of a sinister conspiracy. Beautiful students vanish after joining an exclusive club, their wills seemingly overridden by some unknown force. When Aika stumbles onto an abduction attempt while flying reconnaissance, the attackers' desperation only confirms her suspicions: something big is happening beneath the academy's pristine facade. Her old contacts resurface with the same investigation in mind, pulling Aika back into fieldwork. What unfolds is a twisted plot combining combat, espionage, and mystery as she races to uncover who's behind the disappearances and what they want with the stolen girls. The investigation demands Aika use every skill in her arsenal: her wits, her reflexes, and her trademark wardrobe malfunctions that seem to defy the laws of physics. Expect high-octane action sequences punctuated by absurdist humor and gratuitous fanservice. This is peak Aika: a show that knows exactly what it is and commits fully to the bit.