In a land where two moons shine, one student in the Tristein Academy of Magic, Louise, has acquired the nickname of "Zero". Why? Her "zero" magical talent! With such a reputation for failure, it comes as quite a shock when her summoning spell conjures up a new familiar: a human boy from Japan! The boy must now serve Louise and not get caught checking out the lovely ladies of the academy, or he will feel his master's wrath!