Is It Possible That We Don't Know This Girl?

Concise version: What would you do if one day you discovered that you had traveled through time in a book? No, you must not think this is a good thing. I can tell you responsibly, run, run quickly, and never look back to take pictures. "Husband, who are you talking to?" "Run, run!" Serious version: On a continent where fairies, demons and beasts coexist, the forces of various races are intertwined, and the major dynasties fight with each other, just to dominate this troubled world. But now there are two sons of destiny in this continent. The two sons are competing with each other. Who is the ultimate winner?