The Pitch Black World is a placeholder name for the world where a number of Deep-Sea Prisoner's characters reside. The reigning devil is Satanick, and his godly counterpart is Fumus. Presumably, the Pitch Black World is analogous to its Holy world counterpart, Fumus' World.
Not much is known about the history of this world yet.
However, some denizens of the realm, such as Kurotsuno, have been observed with technology far more advanced than 19th century technology; in her Mogeko Castle cameo, Kurotsuno can be seen looking for her cellphone. The first cellphones were not invented until the late 20th century, making it anachronistic with the 19th century elements. A Nintendo Gamecube is also seen being played in Chapter 8 of Obsolete Dream, which didn't exist until 2001.
Deep-Sea Prisoner has yet to show the general landscape of the Pitch Black World, but has featured some locations that have been unofficially named by fans. Most of the locations revealed thus far are featured in Obsolete Dream.
Satanick's castle appears on the background in many artworks, yet a clear picture of the castle has never been released. A few panels of the 'ATTACK! Devilish Style' comics also show Satanick's bedroom, inside the castle.
Kurotsuno lives in a brown antique mansion, deep in the unnamed forest. She allows Hanten to sleep there on the couch. In front of the mansion, there's a courtyard surrounded by a fence. The mansion also contains a library and its bathroom is shown in chapter 8.5. In chapter 4 a small glimpse is shown of the roof.
Maekami's bar was first seen in Chapter 2 of Obsolete Dream. Thus far, the only employee observed working at the bar is Maekami himself. The bar made a cameo appearance in Wadanohara and the Great Blue Sea, with the Mercenary Trio seen having a conversation in the interior of the bar.
The forest was first seen in Chapter 2 of Obsolete Dream after Kurotsuno and Hanten left Maekami's bar. Many crows live there.
The town was first seen in Chapter 3 of Obsolete Dream when Kurotsuno and Met were shopping together. The official name of the town is still uncertain. It has also been referred to as "the downtown area."
The valley appears in Chapter 3 of Obsolete Dream, as well as in a few other artworks.
The hospital was first seen in Chapter 7 of Obsolete Dream. Its only known patient is Sullivan.
Flora and Fauna
Regarding the flora, some of the trees in the Pitch Black World are curled-shaped as seen in Obsolete Dream, bearing a strong resemblance to Satanick's horns. The forests seem to be mostly conifer trees, and red spider lilies can be seen growing under them.
As for the fauna, there are many crows that live within the Pitch Black World's currently unnamed forest.
- Crea Flankenstein
- Fungas Crocodile
- Lec Hijohshiki
- Roc Hijohshiki
- Satanick - Devil of the Pitch Black World
- Obsolete Dream - The Pitch Black World is the setting for Obsolete Dream.
- Wadanohara and the Great Blue Sea - Maekami's bar made an appearance, with several Obsolete Dream characters making a cameo as customers.
- The name "Pitch Black World" is a fan-given name, derived a scene in The Gray Garden where Lowrie describes different worlds to his students that exist besides the Gray Garden. During his lesson, he makes mention of "pitch black places," as well as "places where everything's burning," and worlds that are "bloodthirsty" places. The official name of the Pitch Black World has thus yet to be revealed.
- It rains in the Pitch Black World when its Devil, Satanick, is feeling depressed.
- It appears that the Blue Sea is somehow also connected to the Pitch Black World. As shown in the Wadanohara and the Great Blue Sea -Reboot-, Satanick created the land, sky, and sea to liven up his world. This also implies that both the sky and land kingdoms are connected to this world in some way.