I have seen a lot of kinds of movies, and I have especially seen a lot of kinds of horror movies. This is probably a thing you’re aware of, but I feel the need to state it baldly just so my next pronouncement has the proper impact.
I have never seen a movie like Nina Forever.
It starts off as an earnest in-your-twenties romance movie, with a lot of back and forth cuts between the present and the future, even though those are like ten minutes apart, to demonstrate how artistic and sensitive it all is I think. Then it veers sharply into a horror sex comedy mashup that has to be seen to be believed. And then the sex comedy part gradually erodes, leaving an uncomfortable mix of the original earnest romance movie and an increasingly dark psychological horror movie, of the type you would not have believed possible when that insane mashup part started. And the throughline is constant gore, but with essentially no violence.
Like I said, I’ve never seen its like. At heart, it’s a movie about the stress that prior relationships have on current relationships, and about the difference between 20 and 30. It is sexy, and it is hilarious, and it is dark and foreboding and grim, and I think I recommend it with basically no reservation. (Well, except maybe be old enough for “the difference between 20 and 30” to mean anything at all to you.)