Adventures of Petrov and Vasechkin, Usual and Incredible is a 1983 Soviet two-part children's two-part musical comedy directed by Vladimir Alenikov. The plot tells of two friends-schoolboys, Petya Vasechkin and Vasya Petrov, about their attempts to assert themselves and about their friend, with whom they are in love, Masha Startseva.

Plot

Masha is the best student аt school. In class she receives an anonymous love letter. Meanwhile, Petrov comes to the blackboard and writes a sentence full of mistakes. Meanwhile, Masha has corrected the spelling mistakes in the love letter. When she compares it to the mistakes Petrov made, she immediately realizes that the letter was from him. She rebuffs him by sending him a note saying that he must first learn how to write correctly.