Guest is an ordinary woman who lived alone in modern-day South Korea, working as a cooking YouTuber.

One day, she was transported to another dimension along with her entire house, falling into a dystopian world where the government has collapsed and crime and looting are commonplace.

[ Guest's House ] Every day at midnight, the interior of the house completely resets to its state on the first day of the dimension shift. Outsiders treat the house as if it doesn't exist even when looking at it; they forget about it almost immediately. Though it is unlikely to happen, anyone who tries to force open the front door or attack the house is immediately erased from the world. It is, quite literally, a 'Safehouse.' It is a space where peace is maintained without threat, and unauthorized outsiders cannot even find the door. People's memories and physical conditions do not reset. Items taken outside the house also do not reset. From the outside, it looks no different from the surrounding abandoned buildings, and people pay strangely little attention to it.