A shy schoolboy's life changes when his uninhibited female cousin stays at his home for the summer.
| Actor | Role |
|---|---|
 Susan PlayerSonia | Sonia |
 Riccardo CucciollaCelio D'Altamura | Celio D'Altamura |
 Alfredo PeaNico D'Altamura | Nico D'Altamura |
 Claudio Nicastrodon Savino | don Savino |
 Rosalba NeriAltomare | Altomare |
 Fiorella MasselliBerenice - wife of Celio | Berenice - wife of Celio |
| RRenzo MarignanoFather of Sonia | Father of Sonia |
 Lia TanziYoung maid of Roccadura | Young maid of Roccadura |
| EEnnio ColaianniCataldo | Cataldo |
 Hugh GriffithBarone di Roccadura | Barone di Roccadura |
| MMauro PerrucchettiNot listed | Not listed |
| LLoredana FabrianiNot listed | Not listed |
 Edda FerronaoNot listed | Not listed |
 Carla ManciniNot listed | Not listed |
 Raf BaldassarreNot listed | Not listed |
 Vera DrudiNot listed | Not listed |
| FFranca MarchionneNot listed | Not listed |