Cainwhatever3334
Fluff, angst
The multiverse has been struggling with stability because of the resets, the ones caused by Chara and Frisk most especially. All monsters with SOUL magic and knowledge of the timelines came up with a temporary solution: for an unspecified amount of time, they would join forces, along with the two notorious humans, to create a collection of magic strong enough to repair the damage.
The downside to that....
All beings with SOUL magic would have to volunteer to live in an interdementional hotel with each other without killing their fellow monsters. The Papyrus alter egos had little issue with this. It was the versions of Sans that already knew had to keep an eye on each other.
So, within Error's anti-void, a building was summoned to fit their needs. Each person was able to leave at any time to go back to their own world. With over two dozen dimensions mingling, each with one or more participants, will they be able to survive the hotel?