L'Eau froide (1994)

An outer suburb of Paris, 1972. Gilles and Christine, both sixteen, are classmates and lovers who have become frustrated with the aloofness of their families and the general monotony of their lives. When the pair are caught shoplifting, Christine's father ships her off to a home for emotionally disturbed children, temporarily putting space between her and Gilles. Luckily for them, though, she escapes and the couple contemplate running away together.