Firefly: Malcolm & Inara Bickering

Nathan Fillion and Morena Baccarin in Firefly
Inara, a Companion; a high-society courtesan licensed by the Union of Allied Planets, falls for Malcolm Reynolds, the captain of spaceship Serenity.
Despite Mal's dislike of her profession, she and Mal have an unacknowledged attraction to each other.
Unfortunately, we never got to see their love story arch come full circle since the Series was not renewed.