Mahou Shoujo Nanoha A's Portable – The Gears of Destiny is an action role-playing game for the PlayStation Portable. Set three months after the events of The Battle of Aces, the game follows the adventures of Nanoha Takamachi as she faces new challenges and foes. Players engage in real-time battles and explore a compelling narrative within the Mahou Shoujo Nanoha universe.
The story of The Gears of Destiny starts around 3 months after the "Dark Fragments Incident" in The Battle of Aces.