No nudity, but strong sex references during the film all involving teenagers

In one scene a teen girl performs oral sex on her girl friend, it's underneath a table so it is out of view but the girls face during it and the dialogue after indicate that's what she was doing

It is revealed that a teacher hides a spy camera in the girls bathroom to watch them go toilet for his own sexual pleasure. In the same scene as well he is groping a teen girl.

The same teacher also tries to rape that same teen girl, it is off screen and we only hear about it from her.

Strong bloody violence towards the end of the film

One scene shows the two teen girls smoke

The atmosphere of the whole film is pretty tense, with one of the teen girls being shown to be very mentally unstable as the film reaches its climax.

The confrontation scene towards the end is also very intense (violence and gore section should give you an idea)