In the distant future, humanity has advanced into space and switched to the new calendar system of Ad Stella (AS). The solar system was split between the inhabitants of space colonies, also called "Spacians" and the Earth-born "Earthians",[2] with a vast economic inequality between the two.

The Vanadis Institute created "GUND", an advanced brain–computer interface that enabled the human nervous system to control artificial appendices and organs. The purpose of GUND was to enable humans