In the year 2XXX, a story unfolds on the surface of a planet devastated by human warfare. In this dangerous environment overrun with hazardous substances, toxic plants, and infectious microorganisms, the Republican Government's organization SG—Safety Guardian—is tasked with the life-risking responsibility of transporting vital supplies. Among them is an elite unit composed of particularly outstanding women known as the "Armored Angel." Equipped with advanced combat gear and unwavering resolve, they face extreme dangers while always striving to protect lives. This work portrays the intense struggle of warriors surviving under harsh conditions. Please note that some images and audio may contain minor distortions.