Don't love a book by it cover- (Shy! reader x Underswap! Papyrus)

"Why do you love me so much?" He shrugged and averted his eyes from her, not actually wanting to tell her "i......uh...don't really know, I j-just do" His face was heated with embarrassed blush now "You can't just love a book by it's cover, you must have a reason......" He pulled on the strings to his hoodie to hide h...