Mount Ebbot's Secrets (Sans X Reader)

Nuh uh! No spoilers! It's Undertale, and you and Sans, it'll be a thing! That's it! Oh, and Frisk is your younger sister! Um... I think that's it! Also, I know it Isn't good, but if you want to hate, go somewhere else! It's TERRIBLE, I get it! Also, just in case, I did not create Undertale, (Duh!) that was Toby Fox, he has... All rights to it, I guess... I'm new to this...