Invisible Banners

Have you ever wanted to go to another world and be the Chosen One? Would you like to experience wonderful adventures and terrible dangers, meet great magicians and warriors, terrible monsters and beautiful princesses, find magical artifacts, recognize friends and enemies? Endure the decisive battle with Evil and ... Great, isn't it? But what if you didn't dream about it? Or rather, didn't you dream about it? How to be now?..
By the will of fate, the Chosen One is forced to fulfill his duty ahead of time - and this is how seventh-grader Sasha, an excellent student and a sissy, who has dreamed of heroic deeds all his life, finds himself in a strange dangerous world where high hopes are placed on him. But his classmate Shura, a serious and incredulous girl who never believed in fairy tales, goes on a trip with him.
She will have to go all the way with the Chosen One if she wants to return home, experience, learn and see a lot, and help a friend, otherwise he will not cope with his mission.
What awaits those who can see the invisible banners above the castle of Nan Quanti? ..