Lu Mingfei doesn’t want to be a superhero

Lu Mingfei’s diary:
On February 10, 2009, I traveled to a terrorist base in the Middle East. There was a man here who called himself Tony Stark and said that we would be executed by terrorists soon! I want to go home!
2009/2/11 Great, I’m back home. A peaceful world without weird things is so beautiful!
On April 25, 2009, I traveled back to that world. I seemed to be constantly traveling between the two worlds. Fortunately, my world was calm and normal.
2009/5/5 I discovered that there are dragons in my world. [Dirty words crossed out]
…
2012/5/20 I have a girlfriend, Eri is so cute.
…
Many years later, Lu Mingfei, who was the Supreme Sorcerer, Prince Nidhogg of Asgard, the Principal of Kassel College, the New Emperor of the Dragon Clan, and the Savior of the Universe, cried sadly: "I really don't want to be a superhero. Did I get the wrong script?" Got it!"
This book is also called - Lu Mingfei, who returns repeatedly from Marvel.