For more than half an hour, this is no more than a conventional and rather boring story about first love among young teens. Maybe the film makers realized this, adding a rude drama for the second half of the movie, which has very little to do with the first half.
It could work, in the same way a good thriller can take a long time before the horrors emerge - but it doesn't, not at all, because the development of the plot is simply not plausible in the characters. There is nothing in them, which convinces me that they would get themselves into that mess. Nor is there anything about them revealed in the second half of the movie, which would bring light to the sudden change.
It's like two movies in one, or maybe even three or four. One or two of them could be good, left alone, but not a chance when they're messed up with each other.
It could work, in the same way a good thriller can take a long time before the horrors emerge - but it doesn't, not at all, because the development of the plot is simply not plausible in the characters. There is nothing in them, which convinces me that they would get themselves into that mess. Nor is there anything about them revealed in the second half of the movie, which would bring light to the sudden change.
It's like two movies in one, or maybe even three or four. One or two of them could be good, left alone, but not a chance when they're messed up with each other.