Naruto: The Outsider's Resolve - Chapter 3.11 (070):

【The first emperor of the Alabasta Empire, Ryan Rowan】Life

685 – crossing;

690 – Eat the Shasha fruit and develop the fruit ability based on the [Desert Emperor] Azir;

695 – Meets close friend Neferutari;

715 – Establishment of the Alabasta Empire;

719 – Rowan died in battle, on the eve of the establishment of the World Government;

720 – the establishment of the world government;

A blank hundred years begin.

…

Eight hundred years later.

Haiyuan Calendar 1507——

Due to the aftermath of the battle of Crocodile, who was the shasha fruit power user at the time, Rowan, who was sleeping, woke up.

…

On that day, one million imperial soldiers stood in Marin Van Doo, and the huge desert disc locked the Holy Land Mary Joa!

Rowan declared to the world:

Your emperor is back!

- Description from novelbuddy

"Your bed is cold," spoke a voice in the room that had her eyes go wide in fear. Nervously, she turned around, gulping softly to see a shadow on her bed as if someone laid down there. The man who had been lying down sat up emerging out from the shadows where he had been waiting for her.

Crossing to One Piece world, he became Roger’s younger brother.

After the final high school exams, Zheng Qing didn't go to the long-desired Imperial University. Instead, he packed his bags, hugged his fox, followed an enigmatic notice, and ventured into an unknown university.Here, there was no advanced math, English, or political philosophy; they were replaced with divination, astronomy, and the philosophy of magic.Extracurriculars here involved demon hunting,And the hobbies were curious and diverse.He would sail the sea of learning and climb the mountain of books.This bewildered young man started his tumultuous journey as a wizard.(Group created: Six Two Three Eight Five Eight Nine Three One, you're welcome to join.)