Now that both of them had a dream about them but being in a joseon era settings... this is just my theory but I think IT IS REALLY THEM but it's their past lives... so I'm guessing that things didn't end up well also in their past making them unable to be together. So, they were reincarnated again but in the modern era setting this time. It's like (this time) their second chance to be with each other again no matter what (and thanks to the red string quest I guess, it's helping them to be together??)
Now that both of them had a dream about them but being in a joseon era settings... this is just my theory but I think IT IS REALLY THEM but it's their past lives... so I'm guessing that things didn't end up well also in their past making them unable to be together. So, they were reincarnated again but in the modern era setting this time. It's like (this time) their second chance to be with each other again no matter what (and thanks to the red string quest I guess, it's helping them to be together??)