إلى oldsurfer_99 :Wrong once again! This is Schulmädchen 3 - Blutjung... directed by Nils Molitor in 1986, featuring Astrid Köhler, Jutta and Rally Van Kamp among others I haven't yet been able to identify. :^)
Scene 1. Katya P., Milena, 2 guys Scene 2. brun, Svetlana, guy Scene 3. girl, Tatiana Belousova, guy, Stepan Skvortsov Scene 4. girl, Yaroslava, Vadim Muromtsev Scene 5. Yulya S., 2 guys Scene 6. girl, guy Scene 7. Milena, Jamie