S1.E5 ∙ Dawn of the Decisive Battle

Makuamuge, an evil overlord wants to take over the real world and video game world so ninja Goemon and his friends must stop him.

Takeshi, a 16-year-old orphan, forms an American football team. During a game, a light interrupts them, revealing Takeshi's Apollonian royal lineage. He has energy powers to control UFO saucers that transform into synchronized robots.

Set four years after StrikerS. Nanoha's adopted daughter Vivio is given the Sacred Heart device and gains the ability to transform into an adult. She then befriends another girl with the same ability.

Two years have passed since the Mauve's uprising. Gallet Revolt who has landed in Grand Lolo, following his battle with Vizarga has undergone great changes in his ideals. While in the "white world," Gallet meets a certain young man. Meanwhile, Varte Parx, who rose as the leader of the Mauve, uses his aerial fortress to put pressure on the Unified Government. The confrontation between the Unified Government and Mauve continues to intensify. Can Gallet change the future laid out in the Otherworld Records? The cogwheel of fate continues to rotate, and the world finally enters a time of change.

The distant future. After reaching its peak, Earth's population fell into decline. AI was developed to help preserve the species and manage the ecosystem; a grand experiment in human diversity. Through genetic engineering, a diverse array of peoples, including beast folk, magical beings, and more, was created to live in a diverse city separated into walled "clusters". Each cluster developed a unique culture, befitting of the people that lived there. Their lives, and the system, is continually maintained by the AI to ensure survival.