Part 1 is an extremely boring tale about a girl who wants to trick her mistress. Part 2 is the same extremely boring stuff from the mistress's point of view. The director then spices the whole thing with some lesbian sex scenes (he obviously saw "Blue is the Warmest Colour" and tried to copy that movie for the sex), which are the most boring thing in the movie. There is a little bit of sadism but for that see "Audition" instead which is a great film. And Part 3 has some twists, lots of plot holes and is completely forgettable. Overall, the biggest question about this movie how it got to the list of top ranked movies.