Rohan Kishibe accompanies Kyouka Izumi, a manga magazine editor, to a buy house at a village far off from civilization. They soon discover the village is home to a group of millionaires who had all mysteriously become rich at the age of 25. Rohan and Izumi enter one of the houses, only to realize that they are trapped by a mysterious power that won’t let them progress unless they follow specific rules lest they suffer the consequences.
(Source: JoJo Wiki)
Kishibe Rohan wa Ugokanai: Fugou Mura‘s first episode is an OVA that was distributed to customers who bought all 13 Blu-ray/DVD volumes of the anime JoJo no Kimyou na Bouken: Diamond wa Kudakenai. The 2nd episode was bundled with the limited edition 2nd volume of the manga. The 3rd and 4th episode were released via a roadshow in only six cities starting on December 8, 2019. All four episodes were then bundled on March 25, 2020 for home-media release.