Republic of Biscotti faces a predicament by the invasion of Galette Leo Knights. In order to save the country, Princess Milchore summons a "hero" from the outer world. Shinku, a junior high school boy living in the Earth, is chosen as the hero.

*This series contain side stories to the anime series that take place before the series, in between some episodes and at the end.*

The story place between the first and second seasons. Fate is having some strange dreams product of the long exposure to magical girls anime and for being apart of her girl for too long.

Sequel to Mahou Shoujo Lyrical Nanoha Innocent with Subaru and Teana as the main characters.