Paranormal Romance is the subgenre of romance where, instead of being a Fantasy or Science Fiction story with a romantic subplot, the relationship is brought to the front and the heroine finds her true love when supernatural forces or sci-fi Applied Phlebotinum are involved. (For this genre, what's "paranormal" is defined as broadly as possible.) So instead of the motley cast of misfits heading out on a journey to slay the Evil Overlord with two characters suffering from UST, the heroine gets.