Extra Doppleganger of the Main Protagonist

The final chapter for Xia Leng's favorite webnovel "Transcending Calamity", which shared the name Xia Leng with the main protagonist was suppose to released today. Instead, the page was empty. Thinking that it was probably due to a bug, Xia Leng went to sleep, thinking about the possible endings to the story. The next day, Xia Leng woke up and found himself inside a royal palace inside of a gigantic and lively city. Finding more and more clues indicating that he has entered "Transcending Calamity". I will follow the storyline and become even stronger than before! But wait... First of all, I'm not the main protagonist Xia Leng, who spent his childhood in the slums, instead, I'm a different Xia Leng, and the freaking fiance of the most beautiful woman I've ever met! The Royal Princess! Wait... Hold on... The Golden Royal Family? "FUCK I'M AGAINST THE MAIN PROTAGONIST!!!" I took his future wife, the royal princess, even if he doesn't know yet. AND I'm part of the Golden Royal Family, who has murdered his parents for some idiotic reason. No point in feeling bad about myself. With my 6000 chapters and over 20000 years of this world's future knowledge, I will uproot all the troublesome potential foes in this world and claim the throne as my own! Either you submit or die, there is no third option!!