The Japanese official website for the ongoing TV anime JoJo’s Bizarre Adventure: Diamond Is Unbreakable confirmed today that “Fugou Mura (Millionaire Village),” the 46-page 5th episode of Hirohiko Araki’s Kishibe Rohan wa Ugokanai/Thus Spoke Kishibe Rohan manga series will be animated as an OVA, and it will be distributed to customers who buy all 13 DVD or Blu-ray volumes of the Diamond Is Unbreakable anime.
The last 13th DVD/Blu-ray volume is scheduled to be released on June 28, 2017. his next manga story.
Each disc comes with one entry coupon, and you need to send all the 13 coupons to receive the bonus OVA.