Harry's diary:

On 1991/6/23, I traveled to another world and was adopted by a couple. They were both very gentle, much better than my aunt's family!

On July 31, 1991, I returned to my original world and received a mysterious email. Oh my God, it was a magic school!

1991/8/8 I saved the world's richest man, Tony Stark!

On 9/9/1991, I encountered a mysterious man. He seemed... very weak?

1991/10/10 I was accepted as a disciple by the Supreme Sorcerer. Relying on the magic power in my body, I don’t need to pay the price like others!

1991/11/11 I became the greatest wizard ever!

...

Many years later, the Supreme Sorcerer, the Master of Chaos, the Third Dark Lord, and the Most Powerful Wizard in History, Harry Potter, faced the crazy reporters and said calmly: "

Thanos may be very weak, but he is right about one thing, the world needs a new order!"

This book is also known as: Harry's Journey Back and Forth Across the World, the Birth of the Greatest Wizard, the Mysterious Man Who Fears the Latitude Demon God

Adrian Wisen, who traveled to the world of Harry Potter, didn't have any big ambitions. As a professor at Hogwarts, his daily routine is to take care of children, farm, and cause trouble for the elderly headmaster. Everyone who knew Adrian Wisen also knew that he was a kind and amiable wizard. Oh, there is one important thing. Never go near those plants he grows!

A person from earth is reincarnated in the Harry Potter World as Draco Malfoy. Armed with future knowledge, he tries to defeat all obstacles while protecting his family, fighting Voldemort and figuring out how to deal with teenage girls.