The Familiar of Zero: "Rondo" of Princesses

What is The Familiar of Zero: "Rondo" of Princesses?

Following Saito's heroic actions in the War with Albion in season two, Saito &amp; Louise return to Tristain, only to have the runes which bind Saito &amp; Louise disappear. Saito &amp; Louise struggle with a relationship no longer defined as Master &amp; Familiar, as they search for an Elf who has the power to restore the dead to life, and may hold the key to understanding Saito's loss of the Gandalfr's power. <br><br> (Source: Anime News Network)