The plot goes like this: transfer students from Germany go to a western school, probably England or America I can’t quite remember. One of the (male)students of the school falls in love with a German boy, I don’t remember much of the rest of the plot. But I think it was called punishment, as it was set in post world war (1 or 2) era and there was a lot of rage as both boys, as well as the countries they belonged to tried to pick themselves up. The funny thing is I’ve been trying to find this book for years now and have almost given it up as a hallucination.
Lost Classics of Teen Lit: Name That Book! 