-The History of Monsters-
A long time ago there was a war between Humans and Monsters. The monsters had the ability to disguise them selves as humans but the humans didn't like that there were monsters hiding in their ranks. The humans were scared of the monsters because the monsters could use magic and for the humans only mages could use magic. They were afraid that the monsters would use magic against them. So they decided to kill all the monsters. After deaths on both sides the humans decided to lock up the monsters some were where the monsters couldn't attack them. A group of mages used their magic to teleport all monsters in the world to a mountain and put a barrier over the mountain so that only humans that have killed a monster could leave.
About the Universe:
-Monster souls are still the same as in the game
-only .1% of humans are mages
-The humans can see a differences between human and monsters in human form
-After a while all monsters except sans has forgotten that they could be human and how to become human because they hadn't transformed for a long time
-Not that much different from the game
A/N
Hey this is just a trial run if you guys like it then me and a friend will give you more. I was gonna try and keep it to the original universe but I think I am gonna just go with the flow so anything will be possible but I am not gonna go to far out for the beginning so don't expect stuff. I'm not going to use my normal universe antics for this because I want to make a universe separate from mine. Its going be my first fan fiction I am actually going to try and continue and go past any endings or long waits for the next info.