A devastating wind sweeps across a desolate, sandy landscape in post-apocalyptic Japan, leaving only decay in its wake. The world's catastrophic state is attributed to fungal spores, with Bisco Akaboshi known as the "Man-Eating Mushroom" being sought after by authorities for his ability to grow mushrooms wherever he shoots his arrows. However, it turns out that he is actually a "Mushroom Protector," spreading fungi to restore the land to its former health and prevent rust from accumulating. Along with crabs Akutagawa and young doctor Milo Nekoyanagi, Bisco ventures through the wastelands of Japan in search of the legendary "Sabikui"—a panacea mushroom believed to consume all forms of rust.
In the post-apocalyptic wasteland of Japan, ravaged by the corrosive Rusty Wi...