Zero no Tsukaima

(English tittle: "The Familiar of Zero")

First Season: Zero no Tsukaima
(ゼロの使い魔)

Louise is a magician at the Tristein Academy, dubbed with the nickname "Zero Louise" due to her inability to effectively use her magic properly, resulting in zero successes. An upcoming test at her academy requires her to summon a familiar, a servant and partner to support her as a magician. Despite desiring a familiar that would be superior to her constantly mocking classmates, Louise ends up summoning Hiraga Saito, your average Japanese boy. Even with Louise and Saito both unwilling to accept each other, they have no choice. Louise cannot attempt another summoning and Saito cannot return to Japan, and so their life together begins. Based on the novel by Noboru Yamaguchi.

Second Season: Zero no Tsukaima: Futatsuki no Kishi
(ゼロの使い魔 ～双月の騎士～)

This sequel is a continuation of the previous season, not long after the war. Louise and Saito seemingly getting along now since she knows that he had given up his only chance to return to Tokyo for her. The story continues as Louise begins to use Void Magic from a mysterious secret book she had recieved from her majesty Henrietta, while a new villain has appeared in town causing trouble.

Third Season: Zero no Tsukaima: Princesses no Rondo
(ゼロの使い魔～三美姫の輪舞(プリンセッセのロンド)～)

Following Saito's heroic actions in the War with Albion in season two, Saito & Louise return to Tristain, only to have the runes which bind Saito & Louise disappear. Saito & Louise struggle with a relationship no longer defined as Master & 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.

Fourth Season: Zero no Tsukaima F
(ゼロの使い魔 F)

The fourth and final season of The Familiar of Zero. Saito and Louise feel their bond deepening as the days go on, and they feel it might be time to take the next step in their relationship... But before that, the Queen has a mission for them. She sends them to the pope, who has both Louise and Tiffania become holy maidens. And with all the interruptions around, by both friends and foes, Louise and Saito's love will be tested to the limit.

Other

 * Super Heroine Chronicle (Magical Girl Video Game)