Me and Charly (1978)

Steffen is a good kid, a teenager who has recently finished school and is looking for work. He lives with his widowed mother, a newspaper reporter. Very little throws him off his stride, whether it is his girlfriend's jealousy of his friendship with Charly, a reform-school boy, or his mother's drunken, playful amorousness one night, because he reminds her of his father.