Abnormal Agonist Syndrome, commonly known as "demonic possession" prevailed in Japan. Patients of the syndrome have malfunction in the secretion of the neurotransmitters and it gives rise to the acquisition of new parts in the body and supernatural power. The patients of "A-Syndrome" were unnaturally concentrated in Shikura city.
Abnormal Agonist Syndrome, commonly known as "demonic possession" prevailed in Japan. Patients of the syndrome have malfunction in the secretion of the neurotransmitters and it gives rise to the acquisition of new parts in the body and supernatural power. The patients of "A-Syndrome" were unnaturally concentrated in Shikura city. DDD has no current stated connections to the rest of the interconnected worlds of the Nasuverse. Although Meruka Kuramitsu from Kara no Kyoukai is referenced in the story, it is simply a gimmick included by Nasu to cause readers of both to do a double-take while reading. It is actually a pseudonym taken from a character in a book in the DDD world.