This is a parallel universe worldview set by a fan. From the perspective of the heroine, it is based on the empire of the Ampera planet. It tells the story of the three children of the great emperor of the dark universe, Ampera, the palace struggle, and the expansion of the empire.
The timeline at the beginning of Chapter 1 was many years before the Ampera people launched the Ultra War. At this time, the empire had just been established, and the Ultra clan was still fighting Beria long ago.
Purpose: Empire expansion