Black Cat is an anime series based on the manga written and illustrated by Kentaro Yabuki. The story follows Train Heartnet, an elite assassin known as the 'Black Cat,' who decides to leave his life of crime to pursue a life as a bounty hunter. As Train navigates this new path, he encounters various allies and adversaries, exploring themes of redemption and freedom. The series combines action, drama, and a touch of humor, set within a richly detailed world.