I was going through some trailers for Chinese movies on my Roku and came across one I'd like to see but it didn't give an English title for it. It says the movie is from 2016. The synopsis is:  after a naive young woman falls in love with a tough boss she gets to know  love and hatred, in the end she chooses to avenge her sufferings. I didn't recognize the actress in the trailer and they never show the guys face. The trailer consist of a girl having a dream about being tied up on the floor of some warehouse and a man in a suit walking towards her whole taking off his jacket, he then unties her and is shown straddling her, that's where the girl wakes up. 

Hmm, I'd have to say dark romance maybe. You could tell the girl wasn't scared even though she was tied up and after she woke from the dream she wasn't upset.
i think i found it for you... its called sadomasochism. https://vimeo.com/ondemand/sadomasochism
sorry if you already found it.....
Thank you so much!!!!! That's it!!
no problem!! im glad i could help