The imperial capital of Mugenri from Len'en 4: Brilliant Pagoda or Haze Castle, stage 5 of the Brilliant Route, ruled by Ooama no Ake no Mitori.

“If you aren’t careful and you phase through the layers of reality in the wrong areas, you shall end up in various endless environments. One of such environments is The Backrooms, where it is nothing but the stench of old, rotten, moist, dirty carpet, the madness of the Victorian era mono-yellow wallpaper, the noise and brightness of the fluorescent lights at maximum hum-buzz, and approximately 600,000,000 square miles of randomly segmented empty office spaces to be trapped in.” “God save you if you hear something wandering around nearby, because it sure as hell has heard you, and as such, already knows you’re there.” W.I.P