MTL - Demon Slayer Starts From the Proficiency Panel - Chapter 18 [018] The author is here

Leiyin accidentally crossed into the One Piece World, and accidentally obtained the Naruto System.

In the morgue full of Uchiha corpses, he opened his eyes…

A mysterious voice rang in my ear…

He looked confused: “Saving the ninja world, what’s the matter with me, the remnants of Uchiha?”

- Description from novelbuddy

A detective travels across the United States and becomes an agent of the Los Angeles Police Department.

After getting through the initial confusion, he repeatedly solved strange cases, became famous all over the world, and was called the most legendary detective in history…

- Description from novelbuddy

When a national athlete of China laughs at being able to win a gold medal in video gaming, what a pro-gamer like yourself ought to do is take your size-42 shoe and measure it against his pretty face!