What kind of title is this?: Manga.
How many volumes are there?: 7 volumes are listed.
How many chapters are there?: 32 chapters are listed.
Where can I read it?: Reading links are listed for Official Site, Pixiv Comic. Check availability in your region.

Synopsis

About Cagaster

It's the year 2125, and a strange plague called "Cagaster" appears. One-in-a-thousand people is infected by this disease, which turns humans into monstrous cannibalistic insects. Two-thirds of humanity is decimated... 30 years later, young expert bug exterminator and mercenary adventurer Kidou and newfound friend Ilie struggle to survive in this brutal new world, while delving into the mysteries of the plague and its causes. (Source: Azuki)

Action Adventure Drama Romance Sci-Fi