Magical Girl Lyrical Nanoha is a Japanese anime television series directed by Akiyuki Shinbo, with screenplay written by Masaki Tsuzuki and produced by Seven Arcs. It forms part of the Magical Girl Lyrical Nanoha series. The Japanese Association of Independent Television Stations broadcast 13 episodes between October and December 2004. The series is a spin-off of the Triangle Heart series and its story follows a girl named Nanoha Takamachi who decides to help a young mage named Yūno to recover a set of 21 artifacts named the "Jewel Seeds".

Magical Girl Lyrical Nanoha is a Japanese multimedia franchise that encompasses five anime television series, four theatrical films, multiple manga and drama CD adaptations and sequels, as well as model figures, plastic models and toys from Bandai. Its inaugural installment was the 2004 television series of the same name, an alternate universe spin-off of the Triangle Heart series.