There is not much in terms of nudity in this film. Unlike most exploitation prison or reform school movies, we just get a confused teenager who gets shunted from place to place because she does not fit in.
The lead character is played by Madeline Hinde, who had a short career in films. The lead guy is played by Dennis Waterman, who had a very long career. He was famous as Jerry Standing from the New Tricks detective series. In 1969, when this movie came out, he was 21 years old.
He tries to be a good boyfriend and friend to Madeline, but she is too traumatized by a previous sexual assault. She is acting out fantasies that she killed her attacker, but in fact he recovered. So it is all about her mental health issues and the creepy guys who linger in her life. If you find that kind of stuff boring, this is full of it. There is some light sexual stuff for a few minutes, but it is mostly left to the imagination.