I think I understand this picture. Nicely thinking out of the box, but I find the execution of the photo un-interesting, which is why I can't score this very high
The foreground is too cluttered to allow the larger rock to be a clear focal point. Even if the rock did strongly resemble a heart (either anatomically or ironically) this is still exceptionally far removed from the challenge topic of "romance".
A bit out of focus, the composition seems to be conceptless. A heart-shaped stone would work better here, because the photo has to live without the title, too.
The oposite of romance, I get it. I think this could have been done better though. The rock is too out of focus and too bright, it looses the detail on the front side. Maybe a different angle?