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...
A Mushroom Keeper's in the city!
!راعي فطور في المدينة
Ein Pilzhüter ist in der Stadt!
¡Está en la ciudad!
¡Está en la ciudad!
Il est dans la ville !
Un Custode di Funghi è in città!
Um Guardião de Cogumelo tá na cidade!
В городе грибной страж!