In a perfect world, every book would have a perfect harmony of story, title, and cover. Of course the world isn't perfect, even with a book named One Perfect Rose.
It's often difficult to recall how I've come up with a story, but I actually remember the origin of the plot for OPR. I had been writing my Fallen Angels series, which was built around four men who had attended Eton and became close as brothers because they all needed a family. Other friends appeared so the series got longer as more intriguing men appeared on the scene.