The heroes of the film are first-graders Snezhana and Alyosha Seroglazov, who received the nickname "TwoBriefcases" because of his small stature on the first day of attending school, as well as a small puppy Kysh.
| Writing | Yuz Aleshkovsky | Writer |
| Camera | Georgiy Kupriyanov | Camera Operator |
| Sound | Yan Frenkel | Original Music Composer |
| Directing | Eduard Gavrilov | Director |