Sans Aus X reader

You are a human who is in high-school and your on a field trip with with your class to go see Mount Ebott...your teacher already had a hotel set up ready for the student to stay in...so you had all your things packed with you when....you go to the top of the mountain with your friend your friend pushes you off...find out what happens next...also the reader is a female sorry.. and I made this book for fun because I like undertale lol...have a nice day/night ^^