The Regressor of Mount Hua - Chapter 80. The Three Swords of the Spring and Autumn Annals (1)

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

She is one the most famous thieves of the twenty-first century and the legendary racing queen who is unrivalled in the underworld.

She is a carefree girl who comes and goes as she pleases like the wind.

He is a powerful underworld boss, known to be cruel and merciless.

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He didn’t think that someone would dare to provoke him by touching what belonged to him. Since they had shown him enmity, then he would return it in her stead.

Passion. Love. Hate. Pain.

It was all impossible to unravel.

- Description from Novelupdates

Adam was a young adult male 22 years of age, he was an orphan. His parents and little sister were involved in a car accident when a truck slammed into their car during a red light while at the age of 8. He lived his life and was able to graduate from university able to get a small office job with minimal pay his only solace was reading novels to escape from his lackluster life. One day after doing overtime and walking back home he was tired and didn't notice that he walked through a green light, suddenly a truck came slamming the young man off his feet and landing hard on the ground. He got reincarnated in a fantasy world as the bastard son of a Duke hated by his siblings he awakened his system after recovering his memories. Armed with a powerful system and an ancient lineage Adam aims to rise to the top and kill his enemies.NO HAREMNO YURINO NTR

In the vast and boundless continent Cangtu, there were ancient sects governing the Ten Old Domains, unworldly immortal clans beyond the Blue Sky, and primordial demon gods dominating the dark abyss that together created a great number of brilliant stories over the long course of the history.