Four third-grader friends live in an old Leningrad house, study in the same class and try to understand their parents and teachers.
| Actor | Role |
|---|---|
| AAnvar AsanovVolodya | Volodya |
| MMarina KrivitskayaMarina | Marina |
| NNastya NikolskayaNastya | Nastya |
| YYaroslav YakovlevYaroslav | Yaroslav |
| FFeliks RavdonikasNot listed | Not listed |
 Lidiya Fedoseyeva-ShukshinaNot listed | Not listed |
 Yelena SoloveyNastya's mother | Nastya's mother |
 Ivan KraskoNot listed | Not listed |
 Tõnu OjaKilistik (в титрах - Тыну Оя) | Kilistik (в титрах - Тыну Оя) |
 Yekaterina VasilyevaVolodya’s Mother | Volodya’s Mother |
 Sergei Ivanovguest at wedding | guest at wedding |