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...
Gifu, Tagakushi, and Gunma Prefectures have 
faced repeated cases of mushroom terrorism,
محافظات غيفو وتاغاكوشي وغونما قد واجهوا
،قضايا إرهاب الفطور
le prefetture di Gifu, Tagakushi e Gunma
hanno subito atti di terrorismo fungino,
as províncias de Gifu, Tagakushi e Gunma enfrentaram 
repetidos casos de terrorismo de cogumelo.