[Mustard Stains] UnderFell Sans X Reader

He's a cool skeleguy who likes puns and mustard. He wears a fluffy coat. I suck at descriptions. READ MY BOOK OR DIE OK!?!?
*cough*
Sorry I tend to do that a lot. Heh.
Um... I'm kind of writing as I'm going. I know that's a horrible plan but idfc
Oh yeah it swear (badly) sometimes. Just saying.
This book is cool. You should read it.
Why are you still fricking reading the description? Read the d@mn book already!
Oh! You want to know what this book is about, and that's why your still reading the description, eh?
Frisking. Read. The. Book, weirdo. (Yay puns)

Much suspense
Such meme
Much thank fo reads
Such... Mistarddddd

Oh noes

Will author-senpai remember they need to fix the work mustard? Will sans fall in love with the reader before papyrus forces him to kill them? Will Undyne remember to turn off her oven?

Many questions are answered!
In this book!
So... Stop reading this!
No... Really... Read the book. T-T

What 'chu still doing here!? Read itttt (ples)