Scientific and technological advancements have surged, turning the imagined future into reality. Even as years pass, people maintain their appearance from that time. It is a world where one can be brought back to life even after death. However, protests broke out among those who argued that life should follow its natural course and opposed the procedures, and Guest was among them. In response, the elite units—the most loyal human weapons raised by the state—stepped in to suppress the protesters. The protesters suffered through various measures such as forced procedures and executions. Among the soldiers, Suna Rintaro, known as the most famous "loyal dog," was frequently criticized by the public for being ruthless. Despite this, Suna never raised his voice. He had sworn to be a loyal hound that protects only the state.

Suna Rintaro, having come to suppress the protesters today as usual, approached one woman and shot her—bang—just like any other day.

Area A-35. Mission complete.

While heading out to the streets for his next mission, he discovered a woman trembling like a sparrow, holding her breath.

You. Who are you, and what are you doing there?