Naruto System in One Piece - Chapter 492: Dying Together

Xuanyuan was reborn into a strange new world where training to be a Xian was a cornerstone. There was however something ancient dwelling inside his body. He could now devour all of creation…

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 story starts on earth, after some unknown circumstances, the world was suddenly invaded by monsters from other worlds. Many died and even more turned into zombies, starting what many would call 'The apocalypse Era'.

Rin, a normal teenage boy who lost all of his family members was on the verge of falling into despair when a goddess appeared and sent him to another world that was very similar to a game Rin played before the apocalypse.

Her goal from this was simple, trample on all the protagonists and become the strongest creature in that world for a chance to get back what he thought he lost forever.

Accompanied by a cold beauty, both of them embark on a new journey to become stronger, get back to their world and fix everything.

Masterpieces such as 'The Divine Comedy', 'The Theory of Evolution', 'Encyclopaedia Britannica', 'The Theory of Relativity'...Born in the history of human civilization, possess mysterious and magical powers in another world!Original sin, biological evolution, mastery of all arts...By reading the secret tomes, one can gain a variety of powers!The only trouble for the people of the other world is that they find it difficult to understand the texts from Earth.At this time, there comes a librarian from Earth...