The first, the Gondry movie, follows a young couple who has just moved to Tokyo. It's a well done portrayal of a relationship slowly falling apart under pressure, but then (I don't want to say too much) it takes a turn for the wonderful. The second, the Carax movie, is about a swamp monster who terrorizes the city and his subsequent court case - not as good as the other two, I think, but interesting, in that it made me think about what it means to be a prophet. The final film is about a hikikomori, a recluse, and it's just kind of beautiful. It also though, makes you think about the whole hikikomori phenomenon, which is absolutely fascinating (and terrifying).
Overall, the movies were lovely and strange and I was totally charmed. Much recommended.