Ready, Steady, Love

Every single girl in the school has a crush on Herr Schäfer the P.E. teacher. Including Tanja. Not that she would ever confess to Anne, her best friend, or to Anne's friend Louisa, whom Tanja doesn't really like anyway.
So it comes as a real shock when the girls find out that there's something going on between Herr Schäfer and the biology teacher. They want nothing to do with a man who's cheating on his wife. Luckily there are plenty of other things going on to take their mind off the affair. The boys ask them to go to the cinema. In the darkness hands start to wander about . But whose hand is it that Tanja suddenly feels stroking her arm? 
In the end everything turns out to be quite different from what they had imagined. Both the boy with the wandering hands and Herr Schäfer's alleged attempt at deceit. And Louisa actually seems to be really nice too.