Meet Louise, a young magician with a lot of potential. Due to her current record of zero accomplishments with magic, the pupils at the Tristein Academy have dubbed her "Zero Louise." In reality, her magic frequently fails horribly. She must now call a familiar to serve her as a crucial test of her magical abilities. She gathers all her magic and wishes for a familiar who is "devoted, attractive, and powerful" at this crucial juncture, and she obtains... Hiraga Saito is a regular Japanese kid. It's hard to say who is more astonished and disappointed, but the rules don't allow anyone a second chance. Louise is stranded with her unusual companion, and he is stranded with her.