Dancing! Academy Investigation!.Seven-O investigates a series of apparently random poison attacks on girls attending the exclusive Primus Academy who are candidates for the prom queen. The Seven-O team infiltrate the school undercover and find that tensions are high over the upcoming prom. The suspects are finally narrowed to Camilla, the best friend of Elle, the potential prom queen. Because of her own past, Max tries to help Camilla, but she takes an overdose of Anthem, turning into a wasp-like monster...