The Theory of Improbabilities

"Back to the Future," you say? "Back to your probability" — the task is much more complicated! And Matvey has to solve it alone — for it all began late one evening when he stepped out of the house for... a minute and ran into some local bullies...
That Monday was a complete disaster: in the morning the internet was down, he was kept after school, and then his mom stunned him with the terrible news — a strange girl will now be living with them! How could such a day end? With a flight from three bandits looking to steal Matvey's phone; a ride on a half-empty bus to the outskirts of the city; a desperate attempt to hide in an abandoned concrete pipe. And landing in an alternate universe where there is no
Matvey Dobrovolsky, but instead — a girl named Miloslava!