Naruto System in One Piece - Chapter 6

The young man of the Qin Residence, Qin Qing, suffered a brutal betrayal by his beloved, his Martial Soul was consumed.Yet, by a twist of fate, his Soul Palace was rebuilt, and the Dragon Soul awoke within him.From then on, the young Qin Qing stepped out of Tianjue City, Sky Stepping the proud sons of heavens and defying fate, he overpowered his contemporaries, ascending to the pinnacle of Martial Arts one step at a time.

Yu Zhengdu joined a small start-up company that claim to offer “life management services”……as a programmer.

On his first day in office, he received a phone call from a stranger: “Hello, I received a text message from your company that informed me of my reincarnation tomorrow……”

Yu Zhengdu: “……??”

Shang Que, the beautiful little boss, said, “New employee, welcome to the Hell organisation in the human world. A thousand years ago, I was known to the human world as the Ghost King of Luofeng Mountain.”

Yu Zhengdu: “……??” From then on, he was incredibly distressed about the development of Hell.

- Description from Novelupdates

When Viscount Ascham’s House’s eldest daughter, Adele von Ascham, became 10 years old, she remembered everything with an intense headache.

Kieran was just an ordinary part-timer — a high school dropout who had also given up on boxing. With no parents and no real family, he survived by working his ass off every day. He was raised by a man he believed to be his father, but later discovered he wasn't — though the man passed away before the truth could fully sink in. What Kieran didn’t know was that he was actually the sole heir to a powerful business empire, the hidden son of a wealthy tycoon.