The female cast given on the screen is: Nadine Chatsy, Catherine Ringer, Sonia Mirelli, Dolly. On the male side: Michel Bacara and Philippe Mouton.
In fact they are: Catherine Ringer (Angela or Emy), Nadine Chatsy (Alexandra), Guia Lauri Filzi (Marina, the headmistress), Marina Hedman (Angela's mother), and several unknowns (to me at least) - beautiful ladies, obviously Italian. No mention of Sonia Mirelli because I've no idea what she looks like, but that doesn't mean she isn't in it! Brunello Chiodetti plays the role of Sandrelli the director.
Angela (Emy) joins a group of charming young ladies applying at a school. The school's headmistress (G. L. Filzi) first welcomes Angela. Then she rejects her on the grounds that she is too young for the school. But she agrees after letting her undergo a medical examination. Then we enjoy a wonderful stripping scene where the six new students undress in a blue and red room. Really a beautiful scene! A man is watching them from behind a see-through mirror. Another man (with a moustache) joins him and they talk about how sweet one of the girls is. The headmistress comes and forbids them to lay their hands on any of the girls while Angela is posing behind the mirror.
Angela is home with her mother. She's crying because of her being denied access to the school, although one of her mother's friends had agreed to help her.
Exercise lesson under the guidance of the moustached teacher (let's call him teacher 2). Turns into a dance lesson. Gee these girls ARE beautiful!
Marina (the headmistress) gives head to the man who was watching the girls (let's call him teacher 1). They talk about the school.
Back to the dancing lesson which evolves into a soft lesbian scene.
Angela's mother is with a serious man (the "president"). He phones teacher 1, who is with Alexandra (N. Chatsy), to ask him to let Angela join the school.
Both women strip in front of the men and start masturbating while the conversation goes on. Teacher 1 makes love to Alexandra while the "president" takes care of Angela's mother, who obviously wants to thank him for his help! When the scene is over, teacher 1 asks Alexandra to join him in his bedroom and hints at a threesome. Alexandra is greeted by the headmistress under teacher 1's concupiscent eyes.
Teacher 2 tells the girls about photography and we are treated to another beautiful scene where the girls are posing for photos. (This director definitely knows how to use a camera and the camera is obviously in love with the girls' bodies. Catherine Ringer knows how to move her body - and us by the way!)
Teacher 2 enters a kitchen and bangs one of the girls (the slender one with long straight blonde hair) on the table. Supposed to be some sort of raping but the girl doesn't really fight back!
Marina (the headmistress) strips in front of her mirror then joins teacher 1 and Alexandra in bed. A threesome follows. He licks their legs and they suck him off.
Angela phones a friend who has found a second-hand car for her. The girl is being taken from behind by an unknown man who finally comes into her mouth.
Angela and her mother buy a music box to thank the president for his help.
Marina and teacher 1 talk about the contract about to be sent to the sponsors, and about a "private album" which we can see between the president's hands and featuring nude photos of Angela. He phones them and asks Marina to meet Angela privately...
Sex lesson at school. Angela discovers the wonders of the male body. Teacher 1 has a conversation with Angela which ends up with an attempt at raping her while Marina is listening behind the door. Angela, in tears, manages to escape. Marina tries to comfort her and invites her to her room where she has her drink something in which she puts some kind of drug. Angela is soon high and teacher 1 comes into the room. He makes love with Marina while Angela masturbates in an armchair in front of them.
Angela tells her mother that the president has asked to see her and expects some kind of job from him. She meets the president who offers her some help on condition she is grateful. She gets the picture and strips for him (wow!) before they make love.
See also here.