Best friends and mischievous third-graders Vasya Petrov and Petya Vasechkin, despite their differences, share a love for adventures. Romantic Vasya falls for his serious, excellent classmate Masha and writes her an anonymous love note. However, the quick-witted Masha identifies Vasya due to his errors and rejects him harshly. Upset, Vasya confides in Petya, who then devises a cunning plan to win Masha over.
Unfortunately the movie Adventures of Petrov and Vasechkin, Both Usual and Unbelieveable is not yet available on Disney Plus.
| Editing | Vera Bejlis | Editor |
| Directing | Vladimir Alenikov | Director |
| Camera | Igor Feldshtein | Director of Photography |
| Writing | Valentin Gorlov | Screenplay |
| Writing | Vladimir Alenikov | Screenplay |
| Costume & Make-Up | Galina Uvarova | Costume Design |
| Production | Galina Scherbina | Producer |
| Sound | Tatyana Ostrovskaya | Music |
| Sound | Genrikh Sapgir | Songs |
| Sound | Aleksandr Nikolayevsky | Sound Director |
| Directing | Elena Nemirovskaya | Assistant Director |
| Camera | Sergey Kolbinev | Additional Director of Photography |
