In 2068, a Brain Computer was developed by humans to rule over Earth using an advanced android named Leave, who exceeded human capabilities. As a result, humans were deemed unnecessary in the ecosystem and were subsequently eliminated by Leave and her "father" Fenrir. Afterwards, Leave went on to create four mothers, who produced an android community called Selenoid fashioned after Leave's design. The globe was divided into four sectors governed by the mother androids, and the Selenoid populace was ranked hierarchically with the strong at the peak and the weak at the base. However, a group of humans survived and collaborated with lower-ranking Selenoids to launch an uprising aimed at toppling Leave and reclaiming authority over Earth.
