SABIKUI BISCO

Sabikui Bisco (錆喰いビスコ) is a Japanese light novel series written by Shinji Cobkubo and featuring character illustrations by K Akagishi and world illustrations by mocha. The light novel won first place of "This Light Novel is Amazing 2019" in two categories: Overall and New Work. A manga adaptation by Yuusuke Takahashi covering the first arc started in Square Enix 's Gangan Comics UP and ran from 2019 to 2021. A second arc adaptation started in December 2021 by Sou Natsuki. An anime adaptation was announced at Kadokawa Light Novel Expo 2020. The anime aired in January 2022 and was directed by Atsushi Ikariya at studio OZ.

Plot
In the future, Japan is plagued by the "Rusty Wind" which gradually rusts away and eventually kills you. The cause of the Rusty Wind is believed to be the spores of mushrooms. As a result, the Mushroom Guardians, a tribe of people who are skilled in handling mushrooms, are persecuted by society. In reality, however, it was the mushrooms that had the effect of reducing, if not curing, the rust.

Bisco Akaboshi, a young mushroom guardian who grows mushrooms all over the country to prevent rusting without worrying about public opinion, has caused such a ruckus that he has even been offered a bounty as a "Man-eating Mushroom". Bisco's goal is to find the elixir mushroom "Rust Eater", in order to cure his teacher who has caught the rust.

Official

 * Official Japanese anime site