(Y/n) was ripped from her own universe which is Undertale cause of a certain time machine that Sans made and she got teleported to a void with (In the void) which is her void now and she has the power to travel and destroy aus Sanses in this story: Undertale Sans (Classic/sans) Underswap Sans (Blueberry) Underfell Sans (Fell) InkTale Sans (Ink) Error Sans(Error) Dreamtale Dream And Nightmare FreshTale/Underfresh Sans (Fresh) EchoTale Sans (Gaster!Sans/G!Sans/G/Any kind of nickname for G) (undertale by Toby fox) (aus by their creators) (art shown that's not mine belongs to their owner) (art that's mine in this book belongs to le me :3) (ENGLISH IS NOT MY MAIN LANGUAGE)

There is a room no one knew about but somehow there was a reset a different one that made almost all the alternative universes in one -------------------------- Also this is an aus sans x monster reader