Part 7 of JoJo no Kimyou na Bouken, though separate from the "main" timeline of Parts 1-6. The part marked an entirely new continuity for the series.
Vaguely an alternate universe analogue of Part 1: Phantom Blood, this time based around a cross-country horse race taking place in America in the 1890s.
It was followed by part 8 JoJolion, which continues the story left off from part 7.
