A medical drama manga serving as a spin-off to the larger Black Jack franchise, Dr. Kiriko: Shiroi Shinigami re-centers the narrative on Kiriko Joryjyu, the enigmatic rival of the legendary surgeon Black Jack. While Black Jack is known for saving lives at any cost, Kiriko operates as his philosophical opposite, a practitioner specializing in euthanasia who offers terminally ill patients a merciful death to end their suffering. This dark premise positions Kiriko as the Shiroi Shinigami, or White Death, a figure who navigates the moral gray areas of modern medicine.

The story follows Kiriko in a contemporary setting, treating patients for whom continued existence has become unbearable. His backstory, rooted in his experience as a military doctor, reveals a man who once shared Black Jack’s zeal for life-saving heroics. However, prolonged exposure to the brutal realities of war and the sight of countless dying patients transformed his perspective. Disillusioned with the blind pursuit of survival, he came to view euthanasia not as murder, but as the ultimate form of mercy. This philosophy brings him into direct, often hostile, conflict with Black Jack, creating a tense rivalry where two equally skilled doctors clash over the fundamental definition of a doctor’s duty.

The narrative structure largely consists of standalone chapters, each presenting a new patient and a new moral dilemma. These episodes allow the manga to explore a variety of real-world medical ethics issues through a dramatic lens. Interspersed with these case-of-the-week stories are deeper plotlines that delve into Kiriko’s past, including remakes of classic Black Jack chapters that originally featured his character, providing greater depth to his motivations. Key recurring elements include his volatile yet grudgingly respectful confrontations with Black Jack, his own complex familial relationships such as the incident involving his father Jorujyo, and the clinical use of a specialized suitcase designed to painlessly end a patient's life. Through these arcs, the manga paints a portrait of a cynical doctor who, despite being labeled a killer, often finds fleeting satisfaction in easing the pain of those who have given up on hope.