Book 1. Other World or Still Not? The Royal Trial Begins!

Arthuria, Marilyn and Lancitel are three friends who are in an amateur music group. They were heading to the Amateur Band Festival. But their bus got stuck in a traffic jam, and in the end it turned out that the friends were late for the opening of the Festival. Getting off the bus, they decided to take a short cut through a small wood... How unexpectedly for themselves they got lost and found themselves in a dense forest, as if descended from the pages of fantasy stories!
In the forest, the girls met the fortune-teller Viviane, and found out that they were on the outskirts of Camelot, the legendary city from ancient times, ruled by King Uther Pendragon. And not just from distant times, but also from another reality! For Arthuria, Marilyn and Lancitel found themselves in the Singularity 20-01, in the world where the history of the Earth's development went in a slightly different way. At least that's what the interface of the mysterious application told them, the control panel of which appeared before their eyes...
What will happen to the girls in a new, completely unfamiliar world? What adventures await them? What kind of interface appeared before their eyes? And how will the Royal Trial, which King Uther Pendragon, the ruler of Camelot, decide to conduct, end?