He is Gin, a transmigrator and the organization boss's trusted right-hand man. He's determined to bring the organization down.
...But for one reason or another, he never quite manages to destroy it.
...In the end, somehow, yet undeniably, he becomes the one in charge of the organization.
(Gin: I really only wanted the Five-Star Group to dominate Japan...)
P.S. 1: The story begins five years before Conan's Year Zero and reaches Year Zero after a hundred chapters.
P.S. 2: Gin has his own organization, called the Five-Star Group, which is a criminal organization in Japan.
P.S. 3: The Black Organization's timeline does not match the original.
This book includes: "Gin Wants the Red and Black Sides to Fight Each Other" and "The Main Plot Doesn't Let Conan Join In".