I beat the game as well today, but the only mention of romance was ZixZax talking about my characters becoming politicians and that one of them tried unsuccessfully getting the other to return their affection, but that it was "like trying to romance a brick wall". I wonder if the ending slightly changes based on your dialogue choices.
Really? I got a totally different one. Mine was that
even though they've had disagreeing opinions about things their affection and passion was strong and that they went on adventuring and that their house was equally full of steamy passion noises and sounds of broken glass. So it was like "opposites attract" kind of romance ending.