The System Favors Me Too Much - Chapter 18 - : The Hero King’s Plan

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

Demons in Academy of Light are described as vile, dark, cruel, evil, impure, and a whole lot of other things. At least, that’s how they’re portrayed in the game—a sacred land where demons and dark energies aren’t supposed to exist. That’s how it was supposed to be... So what the hell am I supposed to do now? Thanks to my rotten luck, my soul ended up possessing the lowest-ranking demon, the one who dies at the very beginning of the story... I’m screwed! I have no other options left... If I want to survive, I have to kill the protagonist.

Eight hundred years ago, Zhang Ruochen, the son of Emperor Ming, was killed by his fiancee, Princess Chi Yao.

Eight hundred years later, Zhang Ruochen came back to life, only to discover that the fiancee who once killed him had unified the Kunlun realm and opened up the first central empire, known as “Queen Chi Yao”.

Empress Chi Yao – ruling the world, she is powerful in all directions; youth is eternal, immortal and immortal.

Zhang Ruochen stood outside the ancestral hall of the emperors, looking at the statue of Empress Chi Yao, with a raging flame of hatred burning in his heart, “When I rebuild it for thirteen years, dare to call the empress to Huangquan.”

- Description from novelbuddy

The strongest King of Soldiers returns to the city of flowers, becoming his fiancée's cohabiting bodyguard!