In the not-so-distant future, a catastrophic event has turned the old capital of Japan into a wasteland, forever changing the lives of it's people. Decades later, three school girls set foot into the now forsaken city.

Vice Principal Mishima learns from the rescued Tanizaki about a man known as the Delivery Man believed to be their leader. Meanwhile, the girls follow a lead that unexpectedly takes them to the Delivery Man himself.