Under Doctor is an ongoing action and medical drama manga by Kyo Tanimoto that follows Haiji, a legendary figure of the underworld renowned as both the greatest doctor and the most fearsome fighter. Born from the shadows of crime and violence, Haiji now walks a razor-thin line between life and death — not as an assassin, but as a healer who operates where no other doctor dares to go.

What sets Under Doctor apart is its rare fusion of heart-pumping shounen action and gripping medical storytelling. Tanimoto masterfully explores the moral tensions of medicine practiced outside the law, asking what it truly means to save a life when the system has failed. Fans of 'Super Doctor K' and 'Black Jack' will find Haiji's world instantly compelling — raw, dangerous, and deeply human. The series delivers adrenaline-fueled sequences alongside genuine medical stakes, making every chapter feel urgent and unpredictable.

With 15 chapters available and the series still ongoing, now is the perfect time to start reading Under Doctor in English. High-quality chapters are available to read free online, so follow the legend of Under Doctor Haiji from the very beginning.