Undercorrupt Stories

I have an Idea for an Undertale AU. And apparently, it's a good idea? So here, have a book. --- Long ago, two races ruled the earth. But when a plague of corruption swep...

"No, no, no, no, NO!" Liza yelled as she watched her friend's dim green soul slowly start to crack. "You can't give up, you can't leave me here! Please do...