Japan has become a wasteland devastated by the Rusty Wind which causes all things to rust away. A suspicious looking priest visits a checkpoint all alone, yet on his back rests a bow priests wouldn't use.
Meanwhile, Milo, a doctor running a clinic in the town of Imihama, is researching new medicines in secret in order to save his older sister, Pawoo, who's being corroded by the Rust. But that day a stranger appears before him...
As you can see, there's 
a colony of mushrooms!
!كما ترون، هناك مستعمرة من الفطور
Come potete vedere,
è apparsa una colonia di funghi!
Como podem ver, há uma 
colônia de cogumelos!