Hi I saw the post about your idea and I do like the distinction that even if they both remember Thier old lives they don't know what the other one knows and she doesn't know what her lover sacrificed to make it happen that is a source of good tension.
I do enjoy character driven interactions when it comes from 2 characters not being mean to each other for the sake of the plot but rather when the tension comes from circumstances.
I did develop a touhou idea for romance I can send you that if you want to check it out the idea was something I didn't publish I developed it a little