Sweet Pea(1981)

Cristiano, aged thirteen, seems to be a teen-ager with clear ideas about his future. One evening he meets May, a stranger, who is probably drunk and, so, she ends up in his bed. An unforgettable night... The morning after, May leaves and vanishes. Some years later, a "surprise" knocks at Cristiano's door: a child, his child, sent there by May, who's vanished again. Abandoned by his own parents, Cristiano will assume his responsibilities and will leave with the child to know Milan, the city he lives in and its people.