Prologue - The Fall

This is the first story I've written which I intend to keep, so please don't judge it too hard. It is, as it's tile suggests, an Underfell Sans x reader. You may want to note that my Headcanon is that Sans is 5'10'', and Papyrus is 7'11''. Finally, please don't kill me if I don't update regularly, I have a lot of stuff in my life at the moment, like orchestra, school, and illness, so I may not have a strict schedule, but I do want to upload 1-5 times a week.