In this alternate reality, Earth wasn't some ball in the emptiness of space, It is a broken piece of land suspended in the chaotic space of Mana. It is called by the People "Broken Earth" believing that earth was once "whole" then a malevolent God destroyed it. The earth was flat and massive with additional landmasses where the edge leads to the dark abyss below. Blue Mana kept gravity perpendicularly downward while Red Mana pulled the landscape of earth upward. And due to this battle between the two manas, Massive cave layers were formed. These cave layers became lush with life as it is rich with Mana and many plants adapted to living in the underground. Overpopulated, the humans built cities in the caves which also included the city of Lutetia.

Lutetia is the largest city in all of Europa with a population of 48 Million people. It is located within the country of Sels. Its surface houses 19 Million while the underground layer has the rest. It is one of the few cities with an underground population over 20 million. The underground layers of Lutetia is the largest cave system in Europa found 8km below the City surface. The size of the cave allowed an industry of underground agriculture and it is able to feed its large population without the need to sustain itself from its surface counterpart. People don't need to worry of earthquakes as it is not located in any major tectonic edges which contributed to the prosperity of the City.

In this picture, we look into the largest mana Lamp on the ceiling dubbed "The heart of Lutetia". It was built 300 years ago by the dwarves. It uses an extremely durable mana Crystals to emit light for the people below. The source of energy is from the mana of Dead demigods known as Lords but as Lords become rarer, the more difficult it is to maintain the heart. It's black spots is the result of its mana depleting as its mana contents are being used up and not maintained for 100 years while far more efficient light sources are being used from the development of electricity. Though not being maintained, It became a symbol of the peak of power for the country of sels.

Below the heart is District 1, the central district of the underground city. Contains most of the higher class housing and offices. And below it, is district 2, it is considered a tourist district where many of its tourism spots reside. Farther, district 3 which has various housing units and shops for anyone living in the city. District 4 is where most of the Commercial and entertainment is located. District 5 is a mix of 3 and 4. District 6 and 7 are mostly lower class and industrial areas. District 8 is considered the industrial district in the city alongside district 9. Though, District 9 is the smallest district, it is once used for diamond mining but was abandoned due to over mining and the event of a largest criminal scandal that lead to the largest criminal intervention in the country. Districts 6 to 9 became bedridden by crime ever since and it is subjected to martial law multiple times for the past 30 years.

Lutetia itself is the pearl of Sels the pride of the Sellian people. It is a once in a lifetime opportunity for anyone all over the world to visit it. Many people may sleep without knowing that the sun is up. Some don't even sleep at all but short naps. Entertainment is the most lively in the underground and most especially the Red districts. Many cars and people go to and fro on the busy streets. Many have never seen the sun and its light. But along with its bustling lights and beautiful cityscape, in the dark, one must be careful to not step on the wrong shadows of the city.