Thirst - directed by Chan-wook Park
This was hugely disappointing, I'm posting it as a Non-recommendation.
I was expecting something stylish, atmospheric and interesting from the director of Old Boy and the Vengeance films. Thirst turned out to have none of what made those films good, it was boring and focused on the two main characters shagging, over and over again. It wasn't sexy sex either just samey. I gave up on it. I have no idea why it's had good reviews, I'd advise you all to avoid it unless you like arty farty tedium.