Diamond is Still Unbreakable! (JJBA:DiU x Azur Lane)

Three Months after Yoshikage Kira was brought down to the unknown hell, Jotaro Kujo discovered an unfamiliar cube that was glowing brightly. After the discovery, he called Josuke Higashikata, Okuyasu Nijimura, and Koichi Hirose to help discover its properties. Okuyasu, curious as to see this object, he touched it, making a sudden glow, where they were teleported to a strange island. Not much of interest, but what they have encountered can change the story of the four stand users.