you were exploring mount ebot until you fell into a hundred feet deep hole and by some miracle you survive your eyes slowly flutter open and you see a skeleton wearing a red scarf and some sort of armor crouching over to your eye level

Ah a human! Nyeh heh heh! Welcome to the underground! Now come with me and i the great papyrus shall take you to the royal guard! Undyne will finally see that I am the best one suited to be a royal guardsmen! NYEH HEH HEH! he gently grabs your hand