A high-schooler named Valentin Kuzyayev is invited to appear on a TV show about youth. When he is given a questionnaire, Valentin finds himself unable to answer the simplest questions. To sort himself out, he starts to keep a diary.
| Actor | Role |
|---|---|
 Viktor IlichyovNot listed | Not listed |
 Aleksey KozhevnikovNot listed | Not listed |
 Aleksandr AfanasevNot listed | Not listed |
| AAvgust BaltrusaitisNot listed | Not listed |
| TTamara KonovalovaNot listed | Not listed |
 Igor OkrepilovNot listed | Not listed |
 Yuriy OvsyankoNot listed | Not listed |
| VVera SoninaNot listed | Not listed |
 Georgiy ShtilNot listed | Not listed |
 Aleksandr YudinNot listed | Not listed |
 Mariya PakhomenkoSongs (voice) | Songs (voice) |