The Familiar of Zero: Rondo of Princesses

Louise Françoise Le Blanc de La Vallière struggles to accept Saito Hiraga's new status as a knighted aristocrat, making their previous dynamic as Void mage and familiar no longer applicable. They encounter a powerful mage named Sheffield, and Saito intervenes to help Louise in the battle. This event prompts Louise to consider the possibility of another Void user existing and to examine Saito's fading magical rune, which sets them on a new quest to find the elf who revived Saito in the past.