The year is 1999. Ten years have passed since DIO’s death, but his presence sticks with many of his former followers - including Hol Horse, a mercenary-turned-freelancer.

Operating from Egypt, Hol Horse is asked by an elderly woman to find her lost parrot - it was trained by the previous owner of Pet Shop, and therefore may also have a stand. After consulting with Boingo, his reluctant partner with the prophetic book Thoth, he discovers the location that the parrot went so he can track it down.

But Hol Horse is confused. Why would a parrot fly all the way to the small Japanese town of Morioh?

From Cireus-Anime website: Saiga Junki is a normal high school boy who tends to be a little apathetic in general but who does manage to get better than average grades. When his archaeologist father, who went to investigate some ruins, is found dead, the family travels to the excavation site where Junki meets a mysterious stranger who gives him a ‘gift’: an ancient artifact that his father left for him …

From MangaHelpers:
The sole survivor and witness to the serial kidnapping case that drew national attention 10 years ago was Oyamada Yusuke. In the end, a total of 108 children vanished into thin air and the case remains unsolved. Since that incident, Yusuke has been able to see evil spirits and has been attempting to seclude himself from society. But one day, he meets Kanon, a member of the anti-doll organization. She explains that the spirits that he has been seeing are called dolls and are the manifestation of people’s incredibly strong emotions. Yusuke accidentally releases a doll named Makina that even the organization had to resort to simply imprisoning instead of destroying. However, Yusuke learns that Makina has a connection to the kidnapping case that he was involved in years ago!

After the war, there are many "Extends" in the city, people whose bodies were modified to make them into dangerous weapons. Inui Juuzou is one of them, and he has no memories of his life and body before his head was transformed into a gun. Strangely enough, his head-gun is designed so that only someone behind him can pull the trigger. Juuzou makes a living by taking on cases involving Extends in the city, and he is assisted by Mary, an intelligent young woman that he has taken under his protection.