One Piece - I Am A Different Luffy! - Chapter 513 - 511 - The Awakening of the Multiplication Fruit.

Qin Hao, possessing remarkable skills, returns to the bustling city, punching the wastrels and reveling in the company of beauties! With the Divine Doctor's Skill in one hand, he specializes in curing beauties but can't treat his continuous streak of romantic encounters, so he has no choice but to hold the school beauty in his arms!

He was just an ordinary man from modern era.Yet he was also a feared deity worshipped in divine era.In this time where gods walked with mortals, he will survive and thrive.He is no longer a man.He is Hades, the God of the Dead and King of Underworld.

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates

Beneath the peaceful façade of the modern world, an undercurrent of shocking crimes roils in the underbelly of society.