Netori: Stealing The Hero's Party! - Chapter 8: The Adventurer’s Guild

The youngest Wiseman of the continent, Chu Tian, has traveled 30,000 years back in time to the age of antiquity due to an accident.

When you wake up, you suddenly find yourself naked, locked in an iron cage, and next to you a pair of eyes are closely staring at you, where will you cover up first? Up top or down below? Luo Qingyu didn’t cover up, she smiled charmingly, and knocked him out. Crossing? It doesn’t matter, she is a top agent, in a different era she can still mix in the wind and water. Unspoiled daughter? Oh, she’ll let the old man regret until his intestines are black…….

- Description from Novelupdates

On the brink of destruction, I regained consciousness and found myself back in the past, 20 years ago. In order to have a peaceful retirement, I must prevent the impending doom.

Crossing to One Piece world, he became Roger’s younger brother.