Mushikago no Cagaster
English title: Cagaster of an Insect Cage
Japanese title: 虫籠のカガステル
Type: ONA
Episodes: 12
Source: Manga
Genres: Action, Drama, Sci-Fi
Studios: Studio Kai
Producers: Netflix
Duration: 28 min per ep
Rating: R - 17+ (violence & profanity)

In a near future, an illness called "Cagaster" made ​​its appearance. It turns humans into insects. The story begins 30 years after the onset of the illness, in 2125. It follows the adventures of Kidou, a boy who fights insects.

(Source: MAL News)