Sans was a female experiment that her father created his name was W.D Gaster. She was a small child skeleton. She had spent her childhood with some tests but mostly her father kept her happy, but this loving family doesn't end with a happy ending. Sans had been sent away from the world into a new one which she can create and change entirely.

She had made a world called Underground. She kept the world safe and at peace but something had tampered with her control, she was taken out of control and locked into the world. She didn't know how or what happened, but she was now trapped in her own world. She was now in a role as a brother to a male skeleton named Papyrus. She did her best to keep Papyrus happy, she kept some major secrets from him just to keep him safe. She noticed she had grown feelings for Papyrus she thought it was wrong and pushed her feelings aside.

During some times of the day she had flashbacks not from the resets but from chips and pieces of her old life. She didn't think much of them but one in particular stuck out.
~Flashback~
*I am going to make you a friend pumpkin* "A friend?" *Yes a friend his name will be Papyrus isn't that a lovely name? "Yeah!!" The tall skeleton chuckled and kissed the young one's skull. *Now go wash up for dinner we don't wanna get sick do we Sans?
"Okay!"
~Flashback end~

To be continued...