Here's my AU, Called UnderMask!
After roaming the streets of the city for five years, Sans and Papyrus are forced to leave.
The humans found out that not just Sans had powers but also Papyrus.
They created an anti-monster group, that started a protest to rid Sans and Papyrus of the city.
The angry mob was filled with members of the anti-monster group, including some people who were just living in the city.
The mob started to push the brothers into leaving the city by following them with pitchforks and torches.
They knew that Papyrus was afraid of fire, after what happened to their old home.
For 2 years after that Sans and Papyrus was in a foster home jumping from house to house.
But there was no hope.
Back to the present, Sans carried Papyrus on his back so they could run faster from the mob.
They ran all the way to Mt.Ebott.
The Haunted mountain.
The angry mob suddenly sensing the depressing feeling in the air, started running back to the city.
They sensed danger.
They sensed monsters.
But being the 14 year old, Sans was, he continued up the mountain anyway.
He kept running making sure he had a tight grip on Papyrus at all times.
Sans kept running until he stopped at a huge hole in the ground.
Sans knew what it was, it was a Cave.
"Maybe that could be our new home." Sans whispered under his breath knowing that Papyrus couldn't hear him.
Sans took one step not knowing it was steep, and fell down into the empty pit of nothingness.
He grabbed Papyrus from his back and hugged him close to his chest so Sans could cushion Papyrus's fall.
"Everything in this world was useless.
Knowing that everyone would hate us because we are special?" Sans thought to himself.
"But I have to stay alive to take care of Papyrus and make sure he stays alive." Through that sudden thought Sans was filled with the determination to live.
Even though Sans's soul wasn't red, he was still filled with determination.
_*_*_