Genre: Action, Adventure, Comedy, Drama, Shounen, Supernatural
Original Name: JoJo no Kimyou na Bouken: Diamond wa Kudakenai
In 1999 in the town of Morioh located in S-City, M-Prefecture, Josuke Higashikata is one of the more popular guys in high school and becomes quick friends with one of his classmates, Koichi Hirose. But when Josuke’s nephew Jotaro Kujo (who’s older than he is because his father is his nephew’s grandfather, hence the age difference) shows up, things get truly crazy. One of DIO’s henchmen has brought the Bow and Arrow to Morioh and someone has been using it on various people in the town creating Stand users—as discovered when one of them, the murderer Anjuro “Angelo” Katagiri, uses the power of his Stand Aqua Necklace to try and kill Josuke for interfering with his plans earlier, but he manages to kill Josuke’s grandfather, Ryohei Higashikata, in revenge for him being jailed by him. Josuke and Jotaro eventually capture him and, as a consequence of insulting Josuke’s hair, ends up getting fused to the rock he was leaning on at the time, becoming a tourist attraction known as “Angelo Rock” in the process.
A few days later Josuke and Koichi go to investigate a seemingly abandoned house, but Koichi is trapped and choked by a man later revealed to be Okuyasu Nijimura. Koichi was eventually struck by the arrow from the house, where he wouldn’t have survived, since he doesn’t have the same spiritual strength as the other victims of the arrow, hadn’t Josuke intervened and healed him. They discover that the culprit of the shot is Keicho Nijimura, Okuyasu’s brother. Their father – formerly DIO’s lackey and injected with DIO’s cells – has now turned into a monstrous creature with DIO’s death. It is then revealed Keicho wants to create Stand users in the hopes that someone will be able to kill his monstrous father. Josuke manages to show the brothers that their father is still at least partially human inside and dissuades them from their activities. However they are attacked by the Stand Red Hot Chili Pepper, which kills Keicho and takes the Bow and Arrow. Okuyasu joins with Josuke, Jotaro, and Koichi to fight the Stand that killed his brother and eventually becomes close friends with Josuke. The group then continues to encounter other Stand users while looking for Red Hot Chili Pepper’s user.
Koichi soon takes center stage when he is kidnapped by his classmate Yukako Yamagishi, also a Stand user, who is in love with him and is determined that he will love her back. He escapes from her and in the process his Stand evolves into a stronger form. The group then finally comes face-to-face with Akira Otoishi, Red Hot Chili Pepper’s user. However, he proves hard for the group to defeat. Only when Joseph Joestar, the father Josuke never knew, arrives in Morioh are they finally able to defeat Akira. The Bow and Arrow are then taken into the Speedwagon Foundation’s custody and all seems to be over for the moment.
A month later Koichi meets manga author Rohan Kishibe, whose Heaven’s Door ability allows him to open up a person’s face like a book and both read and rewrite their memories; Rohan finds himself drawn to the plucky Koichi, but does not get along with Josuke. Yukako and Rohan both become part of Josuke’s group of Stand users along with others the group has encountered, such as Tamami Kobayashi, Toshikazu Hazamada, Mikitaka Hazekura, and Yuuya Fungami.
Soon afterwards, Koichi and Rohan discover a hidden alleyway in town that is not of their world. Once they enter, it is there they meet the ghost of a young girl named Reimi Sugimoto, Rohan’s babysitter in his youth, who was murdered by a serial killer over a decade before. She begs Koichi and Rohan to find her killer, who has stayed in Morioh and is still preying on innocent people. This turns out to be Yoshikage Kira, a serial killer that kills women using his newly acquired Stand Killer Queen to explode their bodies and keeps their hands as romantic mementos. When Josuke and Okuyasu’s new friend, Shigekiyo “Shigechi” Yangu, discovers Kira’s secret and is killed for it, they resolve to put an end to Kira’s murders.
Jotaro and Koichi eventually fight Kira, but before he can be fully defeated, he flees and forces Aya Tsuji, the user of the Stand Cinderella, a Stand that can alter people’s physical features, to change his face and kills her before she can tell Josuke what he now looks like. Shortly thereafter, the ghost of Kira’s father uses a second Stand-creating Bow and Arrow to create an army of Stand users to protect his hiding son and go after members of Josuke’s group. Rohan eventually suspects Kosaku Kawajiri is Kira’s new identity and confirms it after reading Kawajiri’s son Hayato’s memories. However Rohan is killed instantly for his troubles by Killer Queen’s new technique, “Bites the Dust”, which Kira acquired after accidentally being stabbed with his father’s Arrow. The ability plants a miniaturized Killer Queen on a person, with this person being Hayato Kawajiri, the son of the father he’s impersonating, which not only kills anyone that tries to learn about Kira from them, it resets the time from an hour to a day, with the victim dying again as normal as soon as the original time of the explosion reoccurs. This continues until Kira finds out who the bomb killed. It also protects Hayato from harm, whether from the outside or self-inflicted.
When Rohan’s death is repeated a second time, Josuke, Koichi, Okuyasu, and Jotaro were there to meet him. They see Hayato and figure out Kira is masquerading as his father, all of them dying as a result. The memory is then repeated again so Kira can learn who was killed, but this time Hayato tricks him into giving his own identity away before Rohan’s death. Kira was then forced to remove the technique from Hayato to protect himself as he fights Josuke, resulting in an end to the time-loop and saving Rohan’s life. With help from Josuke, Hayato, Okuyasu, and Koichi, Jotaro delivers a blow to Kira that propels him in front of a fire truck and he is run over. Kira is then shown as a ghost as his first victim, Reimi, informs him what happened. Kira attempts to attack Reimi once more, only to be torn apart by countless phantom hands, presumably of his other victims.
With Kira dead and the murders solved, Reimi and Arnold say their last goodbyes to Josuke, Rohan and the other Stand users of Morioh as the two spirits ascend to heaven. As Jotaro and Joseph prepare to leave Morioh, Josuke wishes them the best, but not before using Crazy Diamond to snatch Joseph’s wallet, distressing his father.