I think it is a film class become acting on the usual teenage issues. End of course in such films predictable, similar American Pie - who already took this film well, will also like this German film. Anyone who has been in Frankfurt, will also get back some familiar scenes to face. At one point or another, I found the film a bit strange - Young roars / complains to the girls and they find themselves in the afternoon again even though they live in the same house.
Nevertheless, this film is finally a good successful German film with no frills ala greenscreen.