Contains spoiler from Dungeons and Chapter 12 onward.

As well all know, the setting of Housamo-verse is Tokyo of Japan. For a yet to be revealed reason, a tall gigantic wall was constructed around Tokyo and reaches far into the ocean, preventing people inside from leaving and trapping them in an endless loop that spans far more than million years.

From Thor's dungeon, we have gotten some hints regarding its nature: the wall itself is not really a wall, but what's people of Tokyo perceive to be, with its true form (at least on the ocean's side) is what appears to be Jormungand from F Kare. In the Wild Hunt loop, Oze/Odin planned for the Protagonist to flee from Tokyo and escape into the other worlds by cutting through the wall at the end of the sea, but the plan ultimately fell through as they were unable to defeat Jormungand who managed to revive himself despite the fact that he shouldn't survive the double K.O. from Thor's attack. If we are to take Yog Sothoth's hint from his dungeon regarding that there is no future in the world beyond the wall literally, then this would mean that the world outside Tokyo, the rest of Japan included, has disappeared for some reason.

Here comes the theory part. Given that the 23 Worlds so far correspond to various countries/continents/oceans of the Earth and underworld/sky/space, the reason the world outside Tokyo disappeared might be because those 23 Worlds were overlayed over them in the same vein as Lostbelt from FGO, overwriting the normal history and erasing them from the present. As long as those Worlds, the Representatives, and their belief continue to exist, Tokyo will forever remain the only location on Earth and the goal of ending the Loop cannot be achieved. On the other hand, fully denying those Worlds from existing isn't an option either, since those Worlds also seem to be closely tied with human history itself (e.g. denying Utopia's belief and the future will be forever cut away, denying Bora Bora's belief and all of Earth's oceans will vanish).

So what's your opinion about the situation?