Dark Romance

A sub-genre of romance that contains controversial themes throughout the plot or characters with questionable morale and background. This can also be described as the' villain love interest' trope manifesting into a genre.

Person A: I'm looking for a book with a love story between a dangerous hero with questionable intentions and a strong, morally grey heroine.
Person B: I think you'll enjoy a dark romance book. Specifically by Tillie Cole, T. M. Frazier, or K. Webster.