Neptune

Neptune (ネプチューン, Nepuchuun), often called The City of Sin (罪の 街, Tsumino Machi) is a major financial and political hub that stands out from the rest of the cities and city-states of Earth Land. Through the use of coral-infused concrete and borosilicate glass, the city-state of Neptune was constructed completely underwater, and off the coast of Fiore in the western euphotic zone.

Location and Design
The grand city of Neptune is located approximately 1,400 miles west of the country of Fiore, in the East Sea. Normally building or accomplishing anything on the ocean floor would be an extremely tough task, let alone supply 260,000 people with resources. To solve this problem, the elite architects of Neptune built the entirety of the city in the euphotic zone of the ocean, which is the shallowest, and the only layer of the ocean fully penetrated by the sun's rays. This building design is crucial to Neptune's survival, as the residents of the city would not be able to breath if it weren't for the oxygen harvested from the plants present in the ocean euphotic zone. Normally, the concrete and stone used to create the mass majority of Neptune's skyscrapers and statues would erode almost immediately upon contact with the extremely salty and acidic water of the sea; however, upon a scientific breakthrough, experts have created a coral-infused concrete that actually prevents the erosion of the city, allowing it to keep its glamorous style. It should also be mentioned that the entirety of Neptune's glass is actually the unbreakable borosilicate glass that actually strengthens under the oceans pressure, making it ideal for the City of Sin.

Common Society
Neptune is home to only the most elite aristocrats and celebrities, and entry is determined on how much you can offer Neptune, to assure its grand future. As such, the entirety of Neptune consists of magnificent theaters, galleries, and luxurious shops and boutiques for the please of the citizens. The city is also known for the excess of massive casinos and gambling centers that are present in the inner ring of the city, which brings in most of the profit. However, Neptune's population is not wholly people of great wealth, much to the disapproval of some. Those who have either stowed away into Neptune searching for fortune, or those who have lost there fortune in Neptune, are present in the western area of the city, known as the Ratway. The Ratway is the area of the city that has become generally condemned by the ruling bodies for various reasons. The buildings in the area have all become dirty and dilapidated, and if one does not make enough annual income (as decided by the ruling bodies), they will be fired from their job and forced into the Ratway, with the other "outlaws of society". The Ratway is plagued with crime and disease, and the common folk of Neptune choose to be completely oblivious to the suffering that goes on in the district.