"Kirihito" is a medical and psychological drama manga written and illustrated by Osamu Tezuka. The narrative centers on Dr. Kirihito Osanai, a young and idealistic physician specializing in otolaryngology, who becomes embroiled in a complex web of medical intrigue, personal suffering, and moral dilemmas. The story begins in a remote Japanese village where a mysterious disease, Monmow Disease, is causing villagers to transform into dog-like creatures. Kirihito is sent to investigate the illness, believing it to be a unique pathological condition. However, his research takes a dark turn when he himself contracts the disease, leading to his physical and psychological transformation.

As Kirihito struggles with his condition, he is betrayed by his mentor, Dr. Tatsugaura, who exploits Kirihito's research for personal gain and fame. Kirihito is subsequently abandoned in the village, left to fend for himself. The narrative follows his journey of survival, as he escapes the village and embarks on a harrowing odyssey across Japan and beyond, encountering a variety of characters who reflect the spectrum of human morality, from compassion to cruelty. Along the way, Kirihito's identity and humanity are repeatedly tested, as he grapples with the physical and emotional scars of his transformation.

The story also delves into the lives of other key characters, such as Kirihito's colleague, Dr. Urabe, who becomes determined to uncover the truth behind Kirihito's disappearance and the unethical practices of their medical institution. Urabe's investigation reveals the corruption and greed within the medical community, highlighting the ethical conflicts between scientific advancement and human dignity. Another significant character is Izumi, a young woman who forms a deep bond with Kirihito during his journey, offering him solace and companionship amidst his suffering.

"Kirihito" explores themes of identity, resilience, and the darker aspects of human nature, set against the backdrop of a medical mystery. The narrative is marked by its intricate plot, rich character development, and a stark examination of societal and institutional flaws. Through Kirihito's experiences, the manga presents a poignant commentary on the human condition, blending elements of tragedy, hope, and redemption. The story's pacing and structure reflect Tezuka's ability to weave a compelling and thought-provoking tale, making "Kirihito" a significant work in the realm of manga.