Illustration used on the cover of DDD Volume 1, featuring Karyou Kaie

Decoration Disorder Disconnection is a mystery novel written by Nasu Kinoko and published irregularly in Faust magazine.



Abnormal Agonist Syndrome, commonly known as "demonic possession," is widespread in Japan. Patients suffering from the syndrome have a malfunction in their neurotransmitters that causes the acquisition of new body parts and supernatural powers. These "A-Syndrome" patients are unnaturally concentrated in Shikura city.

DDD has no current stated connection to the worlds of the Nasuverse. Although Meruka Kuramitsu from Kara no Kyoukai seemingly appears in the story, this was simply included by Nasu to make readers of both to do a double-take while reading.[1] In universe, Meruka Kuramitsu is a pseudonym.


Arika Ishizue lost his left arm in an A-syndrome related accident and was hospitalized. After he left the hospital and went back to Shikura, he met a beautiful boy named Kaie Karyou missing all four of his limbs and who lived in a dark basement. The boy asked him to exorcise the "Demons" possessing A-Syndrome patients. Arika became involved in these bizarre cases and in combatting the "Demons".


Shikura City is where DDD takes place. It is located in western Japan and has a population of 150,000 people. More than half of town is made up of fields and mountains. No matter how much money gets invested in the station front, it’s still a town out in the country, two hours away by commuter express from the urban center.

Water Tank - Unmarked on the map and located in the forest five kilometers away from the station of Shikura. Looks sort of like a spaceship. Kaie's room is located underneath it.

Mikishiro Suisan Shikura 2nd Factory - An abandoned (or unfinished) can factory.

SVS - A popular game among young people who couldn't become serious baseball players. Only 2 players are needed- a pitcher and a batter. The pitcher pitches the ball and all other results, such as whether it would be a good hit, are simulated.

Origa Memorial Institute - A national hospital and the one and only treatment center for those with Agonist Disorder. Those with "Agonist Disorder" are transported to this hospital after being taken into custody by the government. Surrounded by a concrete wall, even at the ten meter high glass entrance. Patients can only arrive and leave by helicopter. Said to be located in western Japan and is some 3 hours away from Shikura by helicopter/car. Doesn't take outpatients; if you come there, you're going to be staying there for a while. In that sense, it's more like an asylum. Made up of a large compound and 5 wards (A, B, C, D specifically for those with A Disorder) and a relatively small number of staff in comparison to its size (only in the hundreds). Patients in each ward are allowed to move only to the adjacent wards and only during allotted free time.

In Ward A are those with tumors and no new parts (abilities) or those normal people who just happened to be harmed by those with Agonist Disorder and bear some after-effects. Basically the same as a regular hospital, excluding a limit to free time and lack of outcoming patients. Three examinations a day and optional communication with other patients. Around some 20 A ward patients.

Ward B has the most number of patients. Mainly those who have become comparatively mentally stabilized and whose treatment is just barely realistically possible. Basically the people who probably will be allowed to get surgery. Treatment is basically at a level where excision of tumor = won't die. Whether surgery is commenced with depends on whether an accurate surgical method is discovered. A problem however is that the symptoms are different so research into that field, to develop a generally effective practice, is slow.

Ward C are where those who are popularly called "demon possessed" reside, of course, their conditions have stabilized. Oddly enough, they're less dangerous than those in Ward B since these ones have been emotionally shattered and will not leave their wards. Those allowed of free action have already stabilized so they won't go violent; but the result is that it looks like a prison-like abandoned ward since patients whose bodies have mutated won't leaving their rooms, even if they are emotionally peaceful.

Ward D can best be described as being abandoned, if Ward C were to be described to be a prison. Security (equipped openly with submachine guns) and doctors can only be found in the entrance. Left dark since many of the patients are fearful of light. Basically made up of those patients in the terminal stage whose bodies have matured and treatment is impossible. Around 30 people are alive in there and about 40 bodies are "currently in" the room. A steel corridor maze complete with layers and layers of steel gates.


Main Characters[]

Secondary characters[]

Yamanashi Tomori

Tomori Yamanashi (月見里 朋里, Yamanashi Tomori?)
Yamanashi killed her parents and then, in order to hide the motive, began killing other humans. She killed her parents because they let her bedridden grandfather, who was a burden to their family, die without helping him. Tomori, who witnesses her grandfather's death, was unable to forgive her parents or the villagers for doing nothing. She has long black hair, luminous eyes, and a lovely voice, but the Agonist Disorder transformed her into a human beast with claws for hands, and she is now known as the "lawn mower". Her claws are disintegration weapons, capable of tearing anything caught in them. Combined with the acrobatic abilities, speed, accuracy and power she gained from the Disorder, she is a formidable enemy. Additionally, she acquired an instantaneous sense for danger through her two years of experience hunting humans. However, her killing spree lead the hunter of the demon-possessed, Syuusei, to her. She and Syuusei confronted each other on a bridge, where Tomori far surpassed Hinomori, but she was overwhelmed by the difference in combat experience and lost. She was later taken into custody at Olga Memorial Hospital's Ward C, where she was imprisoned in a cage. Her subsequent fate is unknown.
Shinya Hisaori (久織 伸也, Hisaori Shin'ya?)
Shinya is one of the agonists admitted into a place known as the Origa Memorial Hospital, wherein Arika was also briefly warded. He was warded for A-disorder under the grounds of trying to kill his parents. He was discharged later on counts of being “rehabilitated” and that the incident was deemed to be an accident. "Shinya Hisaori", a fellow patient who befriended Arika when they met during their free activity times.

Yukio Fusou (扶桑 雪緒, Fusou Yukio?)
Yukio is a high school girl with intensified physical abnormalities. Because of anorexia and fasting she gained agonist disorder. She wants to find food that does not make fat due to her fasting. And so came she to the conclusion that she should eat pet animals or humans. She usually sprinkles her food with vinegar. Her disorder lies in her stomach and so she produces highly corosive stomach acid which she can vomit or sweat out of her body.

Kizaki (木崎?)
Kizaki is a man whose affected area is the neck, caused through fatigue. People who meet his eyes are bound to rotate in the same way to fit his neck, but they die when their heads turn around 180 degrees. He himself does not die as his head rotates to 360 degrees. He used this method to kill his wife and daughter and two policemen.


Ookumaneko Mokumoku (大熊猫 目々?)
He is a super NEETWP who has a large role in Outside the Universe. He has created a concept universe within his room, which changes depending upon how it is perceived to work. The laws of the universe can be warped depending on the circumstances.

Minor characters[]


Volume I

  • 1.JtheE.
  • 2.HandS. (R)
  • 2.HandS. (L)
  • 3.formal hunt

Volume II

  • 1.S.vs.S-1
  • 2.S.vs.S-2
  • 4./Vt.in day dream.


  • 3/16 Incident: Outside the Universe (3/16 事件 宇宙の外, 3/16 jiken: uchuu no soto)