Magical Girl Lyrical Nanoha StrikerS

Ten years after the 'Book of Darkness Incident' (see Magical Girl Lyrical Nanoha A's), Hayate Yagami, Fate Testarossa, and Nanoha Takamachi—now nineteen years old—join the Time-Space Administration Bureau to pursue their respective dreams, bound by their friendship. They work as elite mages. During this time, a newly discovered Ancient Artifact known as 'Relics' appears, along with mysterious mechanical weapons called 'Gadget Drones' that target them. To swiftly respond to what would later be known as the 'Relic Incident,' Hayate establishes an independent unit capable of rapid response: the Mobile Six Division, a special force dedicated to handling tasks related to Ancient Artifacts. Meanwhile, four years earlier, Subaru Nakajima nearly died in an airport fire but was saved by Nanoha's intervention. Inspired by Nanoha, whom she saw as her ideal self, Subaru decided under the starry sky that night to become an Administrator mage. Four years later, Subaru successfully becomes a rookie mage after overcoming various challenges and takes the promotion exam alongside her training school friend, Teana Lanswhirl. Watching from afar are Hayate, Fate, and Nanoha, who believe the two will become future stars of the Mobile Six Division. Under the watchful eyes of the three women, the voice of ReinForce II initiates the exam, marking the beginning of the 'StrikerS' story.