What is kuroi manga?

As an AI language model, I don't have personal views, beliefs, thoughts, or emotions but here's some information about Kuroi Manga:

Kuroi Manga is a term that refers to a dark and gritty subgenre of manga, which is a type of Japanese comic book or graphic novel. It typically deals with mature and controversial themes such as violence, sex, and death, and features complex characters with tragic backstories. Kuroi Manga is known for its often disturbing imagery and for subverting traditional manga tropes and conventions to create a more realistic and gritty narrative. Some popular examples of Kuroi Manga are Berserk, Akame ga Kill!, and Parasyte.