The City of Light was filled with light. It was exceedingly hard to even find a dark corner because the entire city was built from glass. On top of each building was a round pearl, intensifying the sunshine that filled the city's every nook and corner with light.

According to the angel named Dreve Rose, the City of Light had a longer history than humanity. The only reason they even had any sort of relationship with the humans was due to the appearance of the Envoy of Light among the humans. Back then, this expert had contributed greatly to the angels, resulting in the opening of this city to humans.

Of course, the city wasn't fully opened to all humanity....