Louise Françoise and Saito Hiraga, esteemed for their bravery in defending Tristain, are under immense pressure to continue safeguarding the Kingdom. Albion is now enjoying a tentative peace, but Queen Henrietta is grappling with a brewing political turmoil. An additional predicament surfaces as a mysterious villain plots against the Crown clandestinely. In the face of these persistent threats, Louise and Saito unite once again. Shedding her previous moniker of "Louise the Zero", Louise's newfound mastery of Void magic provides her with capabilities to obliterate entire villages. However, mastering these powers poses various challenges. As new conflicts arise, the couple must question their principles and determine whether to prioritize honor over self-interest. No matter their eventual decision, their only option is to persist until the very end.