Master Keaton OVA

At any given moment, Taichi Keaton is operating as four different people — archaeologist, historian, former SAS survival instructor, and insurance investigator for Lloyd's of London. He's also a divorced dad who still dreams of funding a dig to prove his theory about the origins of European civilization. The insurance gig pays the bills, and it keeps taking him across Europe and Asia, where the claims he's sent to investigate almost never turn out to be straightforward. Someone dies under strange circumstances. A family secret surfaces. A piece of history complicates everything. Keaton figures it out, usually with some half-forgotten knowledge from one of his many past lives. This is a 15-episode OVA from Madhouse, based on a manga, and it has the kind of quiet, measured energy that fans of Mushishi tend to gravitate toward. Each episode is self-contained, built around a different case and a different corner of the world. There's no overarching threat, no escalating power system — just a thoughtful man in his forties navigating genuinely human situations. If Monster kept you hooked on slow-burn mysteries with an adult cast, this scratches a similar itch. The historical and cultural details feel researched rather than decorative, which gives the whole thing a grounded texture closer to something like Only Yesterday than a typical adventure series. It's calm, occasionally melancholy, and surprisingly hard to put down once you find its rhythm.