Naruto: The Outsider's Resolve - Chapter 2.0 (051):

A struggling businessman on the verge of bankruptcy finds himself drunk one night, only to wake up in the past—specifically, in 1943 London, amidst the chaos of World War II.This is an era of both immense danger and unprecedented opportunity. It is a time when the British Empire, once the unrivaled superpower where the sun never set, is finally witnessing the dusk of its dominion. Meanwhile, the United States is rising to claim the mantle of global leadership, reshaping the world's balance of power.This is the era where everything begins—where old rulers step down and new powers rise to take their place. This is the era where Pierre finds himself, an era filled with the kind of opportunity he never had before. A small, precious chance to rise, to become a giant, to seize the throne of power, to become a ruler, a world hegemon.

This novel is also known as Only I Level Up

10 years ago, after “the Gate” that connected the real world with the monster world opened, some of the ordinary, everyday people received the power to hunt monsters within the Gate. They are known as “Hunters”.

However, not all Hunters are powerful. My name is Sung Jin-Woo, an E-rank Hunter. I’m someone who has to risk his life in the lowliest of catacombs, the “World’s Weakest”.

Having no skills whatsoever to display, I barely earned the required money by fighting in low-leveled catacombs… at least until I found a hidden catacomb with the hardest difficulty within the D-rank catacombs!

In the end, as I was accepting death, I suddenly received a strange power, a quest log that only I could see, a secret to leveling up that only I know about! If I trained in accordance with my quests and hunted monsters, my level would rise.

Changing from the weakest Hunter to the strongest S-rank Hunter!

- Description from Novelupdates

Before transmigrating to this world as a student in forensic science major 4 years ago, Jiang An was already a university professor in this area. Now, with full marks in all courses, he graduates and joins the Jiangcheng City Public Security Bureau, becoming a forensic doctor.“Everyone is free to express their opinions; whether supporting or opposing the suicide conclusion, feel free to speak up.”“It's definitely suicide!”“High school pressure is huge nowadays!”“Mr. Li! I believe that this female student, Li Rui, did not commit suicide! She was hung after death!” said Jiang in a deep voice.

John Transmigrate to a cultivation world in a perilous situation as a war prisoner.But fortunately he also got a system that lets him upgrade everything if he has enough patience.