One Piece: Don't Worry, I'm a Doctor - Chapter 40 - : As Long as I’m Here, He Won’t Die!

The best way to declare war on a spy as an ordinary person is to become a spy as well.As a spy, if you want to go to war with a powerful espionage organization, join an equally powerful espionage organization.If you are unable to join any powerful espionage organization, then establish your own espionage organization and fight until destruction or victory.This is the war of spies, telling the story of how a group of ordinary people achieved extraordinary success.

In a world ruled by mana and bloodlines, John White was born with none.Reborn from Earth into a noble family, he became the forsaken son of a duke (a bastard) bullied by siblings, ignored by servants, and banished at fifteen like trash.Two years later, he's dragged to a mana mine to be quietly killed by his brother's lackey. But fate has other plans.Deep underground, an ancient abyss-grade ring awakens. It merges with Earth’s forgotten technology with the world’s magic. Fueled by pure mana, it unlocks the Black Hole magic, granting him power never seen before.From a worthless outcast to a terrifying Void Lord, John begins crafting magical tech tools that warp reality itself. His enemies have no idea what’s coming.Will he burn his past to ashes… or rebuild the world in his own image?

Lu Junxi reborn in a small fishing village in Japan in 1950 and obtained the “Fishery King” system, which can help him detect the location of fish, and every time he fishes, he returns with a full reward. Can help him build the most cattle fishery, aquaculture I am the most hanging!

At this time, the Japanese fishery and ocean fishing have not yet started, and the offshore aquaculture industry has not yet developed. Lu Junxi felt that he wanted to be the owner of the Hokkaido fishery!

“No, wait, there are only five men left in the whole fishing village, who will go fishing with me?” Lu Junxi was dumbfounded.

- Description from novelbuddy

Jiu Xuan Xian Zunlin also unfortunately encountered the legendary dragon attack when he was robbed and thundered. He returned to his youth and became a high school student Lin Yi. He also found his left hand position and was sealed with a dragon..

Since then, Lin has stood in a new world with a strong attitude, punching the old tyrannical gangsters, kicking and defeating the family.

As a result, a strong newcomer rises and officially opens.

- Description from Uukanshu (translated)