Louise Françoise Le Blanc de La Vallière attends the prestigious Tristain Academy, where she struggles with magic, causing her spells to frequently fail. Mocked by her peers as "Louise the Zero," she faces a critical moment when first-years must summon their familiars. Louise's attempt results in a massive explosion that everyone assumes is another failure, yet Saito Hiraga emerges from the chaos. Initially treated as a mere servant, Saito is forced to perform menial duties such as cleaning Louise's clothes and eating off the ground. However, a strange mark resembling that of the legendary familiar Gandalfr appears on his hand, hinting that he is far from ordinary. As Saito adapts to this unexpected new life, Louise begins to uncover her true potential, proving she is more than the humiliating nickname suggests.

Background

Geneon Entertainment USA licensed the anime up until it's closure. Funimation later picked up the series until it was dropped due to poor sales. Sentai Filmworks later picked the series up and re-released it.