In reference to Korean movies.
One of the finest films I've watched in ages totally ambushed me because I came to it without
any prior knowledge, aside from the fact that I knew it had received some good reviews. It also makes it impossible to recommend by name without negating those particular circumstances.
So, it's on you. (Oh, but we do love a paradox):
At first, I thought I was simply watching an albeit slightly sinister and unnerving story based around the dynamics of a love triangle in the context of social inequality in South Korea, and the slow reveal afforded by my ignorance, combined with the movies masterful subtlety, made the experience all the more effective.