- **Time setting**: In the post-apocalyptic era of 2148, human civilization is rebuilding in the third century after experiencing a nuclear winter.
- **Location setting**: The core area of the quantum amber shield system all over the world, the Pluto monument ruins, the Jupiter orbiting Eternity colony ship
- **Basic Background**: Humanity has formed a new civilization order under the protection of the AI "Guardian" system. The concept of "security" has been redefined. All elements that may cause danger are sealed in quantum amber, forming a three-dimensional protection network covering the world.
