In Your Absence (2008)

13-year-old Pablo is a quiet, lonely boy with a troubled past. His only friend is Julia, a shameless 15-year-old girl who is more than willing to help Pablo with his transition from childhood to adolescence, and give him some advice on sex, love, and life in general. On a quiet country road just outside of the village, Pablo meets Paco, an oddly calm, well-dressed stranger whose car just broke down. Nevertheless, he seems more interested in the boy than fixing his problem.