Without a wedding dress Prism Stone, Rizumu cannot perform "Aurora Rising" nor participate in the Prism Queen Cup. Mion bargains Serena and Kanon for their Pure White Wedding Dress with Prism Stones she won from her tournaments. While Serena and Kanon have no use for the Pure White Wedding Dress, Serena challenges Mion to an endurance dance-off, while Kanon challenges Rizumu at the Aquarium Cup, under the condition that she breaks up with Hibiki if she loses...