It's the old uniformed reform school fetish done quite well by French studio Dorcel. I'm not sure whether this "institute" is really in Russia but it might very well be. Six scenes, or "lessons", play quite well if you buy into the flimsy plot and go along with it. This isn't California but they are following the law...condomized sex here.
Scene one: After an intro and voiceover by the school's headmistress, two of the students (a blonde and black haired )are outside of the school. A guy is raking leaves. They go after him and they fuck in the leaves outside. A quickie scene.
Scene two: A male tutor is supposed to be teaching two black haired students but the bookwork doesn't last long as he locks the headmistresses door (so she won't be able to see them) and the three do another kind of study.
Scene three: One of the women skipped class so she is summoned to the headmistresses office and escorted there by two guys. The mistress watches while she gets fucked and when they are done with her, they turn their attention to the mistress.
Scene four: The mistress will not allow any outside visitors in. As she says this in the voiceover we see that isn't the case as Mike Angelo (the only male star I recognize and the only one not included in the credits for some reason!) is in a bedroom with his black haired girl. Her blonde roommate joins them for a 3 some with lots of cool bed creaks. Mike rocks in all ways and the two ladies in this scene do a lot of kissing. Hot stuff.
Scene five: Another scene with the mistress watching as one of her students gets teased with a whip with expected action following.
Scene six: The headmistress and one of her students in a g/g scene.
Extras are plenty with a half hour "making of" documentary, six language options and six subtitle options, and eight trailers.