Undertale sans x Japanese reader

this story is about:...You are Japanese you got bullied a lot so you went up to the mountain (can't remember what the mountain is called) and you tripped and fell in to a hole in the mountain....

the story will take place when you are past the Goat Mom (can't remember her name) and know you are walking in the snow you can feel some one following you..then........Read the story to find out what happens next!