Noce blanche (1989)

Middle-aged Francois (Bruno Kramer) is a philosophy teacher who lives a long-distance life in a small town with his pleasant wife. However, his student, 17-year-old Matil (Vanessa Paradis), showed up with the rare maturity and unruly of a teenager. Francois approached her with the mood of saving the fallen girl, but was uncontrollably attracted by Matil's enthusiasm and intelligence. They fell in love, passionate and unforgettable. But when Matil asked Francois to leave his wife and be with her, the man flinched. He thought of age, marriage, morality, identity, and too many trivialities. Once again desperate, Matil destroyed the teacher's life in a fierce way, subverted his career and marriage, and then disappeared without a trace. When people found her again, her room said, "Francois, this is the sea."