Der schönste tag meines lebens (1957)

Toni, a small Hungarian orphan, was taken in by old sailing captain, Mr Blumel. This one, seeing the gifts of his young friend makes him admit in the choir of the little singers in Vienna. He adapts very quickly to his new life. His comrades love him and his choir masters too, but especially Miss Maria, who takes care of all the boys and who is for him a real mother.