A strange disease is linked to a mysterious hole leading to an underground world: the Asylum. "Sleepers" go into this world to fight strange monsters and recover unknown resources. Now, a young boy who dreams of being a hero has arrived at the Asylum.
First, Kobato-san, please
fire from a distance.
أولاً، أطلقي النار من مسافة  
.بعيدة يا كوباتو-سان
Primeiramente, Kobato, atire à distância.