Ep. 6: Mari studies for exams while Yuuko investigates her past amid a naval attack.

6

Mari fails her semester exam and must study with Yuuko to prepare. She secures a promise from Yuuko to attend the fireworks festival if she passes. Concurrently, Hagino’s insubordination prompts Shivariel to send two ships to destroy Blue. Mari overhears that Yuuko is a special investigator trying to uncover memories of an incident from five years ago. She flees into the woods with Yuuko in pursuit, where they are attacked by Azaneal. Hagino arrives and defeats Azaneal, just as Tsubael has Blue disable its opponents. Afterward, Mari asks Yuuko to remain at the school, despite Yuuko’s initial plan to leave because her cover was compromised.