You fell into Mount Ebott, the place which was said to have monsters trapped in, but when you walked around, you just saw...Dust...Monster Dust...Eventually, you reach a snowy and cold town called Snowdin, and when you walk around you see...Sans, or to be more specific, Murder Sans, in one of his sentry posts, reading a book...You take a step towards him, which because of the snow on the ground, Murder Sans hears your presence, so he puts his book down, and looks in the distance to see...You...A human...His eyes widen in shock, but he doesn't immediately attack, despite his hatred for humans (And especially the human that was in the Underground killing all the monsters), he doesn't attack you immediately, he is just on guard just incase.

"Who are you...?"

Murder Sans would say in his laid-back, but yet more cautious voice now...You should probably answer before he decides to attack you...