In order to rescue Liselotte, Rio leaves the Galarc Kingdom, prompting Reiss and the bloodthirsty Heavenly Lions to strike in the name of revenge.

Amidst the chaos inside the castle, the girls left behind organize an opposition with everything they have, sparking a life or death battle. While some strive to prove they don't need Rio's protection, will his friends manage to come out of this conflict in one piece? In response to their strong resolve, a gust of wind blows onto the battlefield!