Not the only one

They say Muzan is the first ever demon that ever lived, the one that turned so many people into demons for a thousand years. The one that terrorized humans and ate them for a thousand years. But what if a certain demon tells him that he's really not? Will he ever get to accept this?

(The cover is how I see Apple's character as. Disclaimer: Nothing in this story is mine except for Apple's character her father and the little ones.)