In a retro twist, a group of girls, Ayame, Sumire, Renge, and Satsuki, are entrusted with defending the Earth against a formidable new foe. As they delve into piloting the cutting-edge mobile armor, Z-Mind, these girls must juggle part-time jobs and the pursuit of a typical life. Yet, their balancing act between duty and everyday challenges may determine the fate of Earth against the encroaching darkness.