Z-chan makes her home in the Shutter District, a sector of ruined Nerima ravaged by a photon energy disaster of uncertain origin. The towering Photon Research Facility stands alone amidst the devastation, a solitary monument. Her dwelling, Photon House, is built from components scavenged from the base of this tower.

Getter Rays now dominate the environment, supplanting the advanced photon energy that once powered the region. Despite this shift, Z-chan persists in utilizing highly efficient photon energy to sustain her household alongside Gre-chan.