In a desperate attempt to escape Underhell, Charlie's group suddenly finds themselves sucked into an alternate universe where monsters and humans co-exist peacefully. Though, there are versions of themselves walking around as well. This might take some getting used to. Varikai helped create this crossover. Her story is called "Organized Chaos" and it's on AO3.

Summary: This is Underhell. A human king has taken the throne and rules the Underground with blood. You're a grown woman being thrown into the aftermath and only by making friends with a few monsters will you understand who the real ones are. Tumbler account is amartin22stuff for anyone curious.