Eptun_Stories
This is a fan-made story inside the story of Undertale.
In this book, Frisk and Chara are in their own lives, Chara's set around the Genocide run, killing and ruining the world below. While Frisk's is set around living in peace, friends all around him.
Both have the power to "reset," to spawn back at a certain spot after death. But something goes wrong, and both end up together in one world!
Both confused, but Chara decided that it didn't matter, and she could destroy this one to. Now with a insane killer on the loos, Frisk must stop him. But with time and space messed up, neither can reset, which means if either die... Both may not return.