PostKid ポストキッズ Vol.1 by Ugawa HirokiWe are at a time when a terrible epidemic has ravaged civilization. The survivors walled themselves inside huge fortified cities, which very quickly became the equivalent of a City State and conflicts quickly broke out. However, services such as deliveries must be provided and it is up to the Universal Postal Foundation to take care of them. She employs children, aided by robotic companions, mysteriously immune to disease to perform the service, such