One Piece: King of the World - Chapter 192: Vegetative Shiki Awakened?

After 50 years of being in the position of Hwacheon Clan Leader, Kang-hyuk, widely renowned as 'The Dragon' retires.

A teenager who unexpectedly gets transported to the modern world from ‘the world of the immortals’ . He finds himself in the body of an ordinary guy. He wants to go back to his world and for that, he will have to practice to get stronger and investigate the reason why and how he crossed through to this world.

- Description from Novelupdates

What the hell is this? What the hell happened here?

This is a brand new story.

Survive the darkness, see the light

There is no right or wrong, it just depends on which side you are standing on.

To be a god, or to be a man.

To be good, or to be evil.

Just what is…the highest order of weapon that humanity has?

——————

After a great catastrophe struck, the world was set back many years and humanity started living in anarchy.

With time, society started building up again and people were now living in walled strongholds and fringe towns across the land.

Humans have also become distrustful and ruthless in an unforgiving society where the strong survive and the weak are eliminated.

Growing up in such an era, Ren Xiaosu had to fend for himself.

After an incident, he gained supernatural powers…

- Description from Novelupdates