Tower.of.God

In the webtoon, "The Tower" is a mysterious structure that is completely enclosed and hosts many unique environments. It is permeated by an element called "Shinsu", which has strange properties similar to magic in other comic universes. It is inhabited by many different intelligent species. Living on the top floors is associated with a higher status in the Tower and better living conditions. This is a result of ascension from one floor to the next being only allowed by passing increasingly difficult tests of strength, dexterity and wit. At the top of the Tower sit the "10 Great Families", which form the governing body of the Tower. A figure known as King Jahad is the chief leader of this body.

Each floor is composed of three layers: an external Outer Tower which serves as the residential area, an Inner Tower where people are tested, and a Middle Area, which acts as a network linking each floor. Residents of each floor are given the chance to ascend, provided that they are deemed "worthy" of doing so by Headon, the First Floor's Guardian and caretaker of the Tower. Such people are referred to as "Chosen Regulars" in Tower of God. The Tower is sealed from the vast, unknown "Outside" by portentous, impenetrable doors. On rare occasions, extraordinary people are able to open the doors and enter the Tower. Such people are called "Irregulars" in the webtoon, and protagonist Twenty-Fifth Baam is one of them.

According to the author, each floor is the size of the North American continent