In a realm of sorcery and nobility, Louise Françoise Le Blanc de La Vallière, a conceited mage at Tristain Academy, struggles with her ineptitude in spellcasting, earning her the scornful moniker 'Louise the Zero.' During a summoning exercise gone awry, where chaos reigns, she inadvertently calls forth Saito Hiraga, altering their fates. Branded with a mysterious insignia post-summoning, Saito becomes Louise's unwilling servant, subjected to menial tasks and indignities. As revelations unfold about Saito's true identity as Gandalfr, a legendary familiar, a turbulent yet thrilling journey commences. Zero no Tsukaima unravels the spirited escapades of Saito adapting to his unfamiliar role and Louise challenging preconceptions, unveiling hidden depths beneath her initial facade.