The medical mystery manga Ameku Takao no Suiri Karte: Sphere no Shitenshi centers on the brilliant yet eccentric Dr. Takao Ameku, the deputy director of the General Diagnosis Department at Tenikai General Hospital. This specialized department is where patients whom other doctors cannot diagnose are sent for answers, from those reporting seemingly supernatural phenomena to individuals suffering from inexplicable physical symptoms. Dr. Ameku, a genius with a near-photographic memory and extraordinary deductive skills, finds her true passion lies not just in treating illness but in solving the complex puzzles presented by mysterious deaths and potential murders. She is frequently accompanied by her long-suffering but loyal assistant, Yu Takanashi, who is often dragged along into her dangerous and unorthodox investigations. The story blends medical drama with detective fiction, as Ameku uses her profound medical knowledge to uncover the truth hidden behind bizarre symptoms and unnatural deaths, often revealing that the most mysterious cases have a logical, if rare, medical explanation.

The narrative typically follows a case-by-case structure, with each arc presenting a new medical enigma for the team to unravel. The specific story arc Sphere no Shitenshi (Sphere Death Angels) serves as the title focus for this particular manga adaptation, which began serialization in September 2024. While specific plot details of this arc are not detailed in the search results, it falls within the series larger pattern of presenting seemingly impossible medical scenarios that require Amekus unique intellect to solve. The series is set primarily within the Tenikai General Hospital, a sprawling medical institution where Ameku must often navigate not only the complexities of her patients conditions but also the hospital's internal politics and skeptical colleagues who view her as an oddity. The cast includes figures like the pragmatic nurse Mai Konoike, and antagonistic forces such as Amekus powerful uncle, Owashi Ameku, who often clashes with her over hospital resources and authority. The manga adapts the long-running light novel series of the same name by Mikito Chinen, a practicing doctor who brings authentic medical detail to the intricate mysteries his protagonist solves.