The city walls of Otagani are made up of a lightweight nylon-like material that allows the city to inflate and deflate like the collective breath of its citizens. When the city is deflated, all you can see is what is directly in front of you, alone in a chamber of fabric. But during times of celebration, you can see the entire population at once. The walls glow with trembling color, while the city slowly rises, only to be restrained by the thousands of ropes that keep the city from escaping into the sky.