Disclaimer!!!: This disease originally belongs to Wira_ekitai, translated and summarized by ChatGPT because I couldn't read it and didn't want to type it out.

I do mention spider rain in the prompt, which is when there is spider silk everywhere from spiders ballooning to get away from their birth site. It's most known in australia I think. I don't know if it happens anywhere else.

Scale-Powder Disease

Japanese Name: 鱗粉病

Reading: りんぷんびょう (Rinpun-byō)

English Name: Scale-Powder Disease / Wing-Scale Disease

Danger Level: ★★★★☆

Description

[DIRECT]

蝶や蛾の翅が生え、鱗粉を撒き散らす病気。

鱗粉には様々な成分が含まれているため嫌われやすい。

が、逆に動物には好かれる。

この病気に掛かると言葉が話せなくなっていく為、

人として見られなくなる事が多いようだ。

中には蝶人間狩りに遭う者もいる。

Natural English translation:

A disease in which butterfly or moth wings grow from the body, causing the patient to scatter wing scales.

Because the scales contain various substances, people tend to dislike those afflicted with the disease. Conversely, animals tend to like them.

As the disease progresses, the patient gradually becomes unable to speak, and as a result, they are often no longer regarded as human.

Some afflicted people even become victims of butterfly-human hunting.

Symptoms

Butterfly/moth wings develop.

Wing scales are continuously scattered.

Speech gradually disappears.

Humans tend to reject the patient.

Animals tend to be attracted to them.

Progression

The patient progressively loses the ability to speak and becomes socially regarded as something other than human.

Cure/Treatment

None stated.

Additional Notes

This is one of the most explicitly tragic social diseases in the collection: the physical transformation is only part of the problem; dehumanization and hunting by other people are part of its lore.

Hold your breath, Stay awake