Four years have passed since the urban terrorism incident known as the "JS Incident." The unit "Mobile Six" that was at the center of solving the case has already been disbanded. Takamachi Nanoha, the ace of Mobile Six, is currently taking a moment to rest her wings――. The new series' protagonist is Takamachi Vivio, the magical girl and only daughter of Takamachi Nanoha, who is in the fourth grade! "Lyrical Magical, I will do my best!"