Air Gear: Kuro no Hane to Nemuri no Mori -Break on the Sky- (OAV) DVD

Takamachi Nanoha is a normal fourth-grader who feels a little useless and out-of-place with no purpose. Then one day, she saves a ferret, who turns out to be a mage from another planet who came to this planet to search for the jewl seeds. Nanoha agrees to help, but this task gets complicated when another girl arrives to steal them.