What kind of title is this?: Manga.
How many volumes are there?: 49 volumes are listed.
How many chapters are there?: 539 chapters are listed.
Where can I read it?: Reading links are listed for Official Site. Check availability in your region.

Synopsis

About Usogui

Driven by his desire for quick money, young Kaji gets involved with a loan shark and soon finds himself hounded by debt collectors. One day, a mysterious man named Baku Madarame appears before him. Calling himself a gambler, Baku boldly declares that he’ll help Kaji repay his debt—and descends into the world of underground casinos… (Source: MANGA MILLION)

Action Psychological Thriller