One Piece: My Crew is from Other World - Chapter 6: Joining as Handymen

When he woke up, Yang Yuan found himself reborn.

When he was one year old, “Ah, not only rebirth, but also transmigration.”

At the age of three, “Goldfinger is finally in place!”

Portable space is handy.

Fourteen years old, “What the hell is my golden finger?”

Yang Yuan screamed in the sky…

Thirty-year-old, Yang Yuan, who was hugging from left to right, stood on Emperor Tread Peak, pointing to the vast land, “This is the country that I have conquered!”

Omg, golden fingers are so fragrant!

- Description from novelbuddy

Reincarnated without memories, given a second chance as a chimera with a limited lifespan. Leon struggles through his strange new life. He attempts to improve his dungeon and evolve himself to live longer and become the strongest Dungeon Master—no. The Dungeon Overlord.Helped by his Dungeon System: the mysterious Ifrit, Zafira a Level 100 Succubus Queen, and his band of trustee goblins. Leon aims to overcome his limits, survive and reach the pinnacle of the world. Whether through trade, domination, or tricking the hero's beautiful party members into becoming his private mercenaries.Leon will face the weakest and strongest beings in the magical world of Umbra and surpass all!

A love story that came about due to Fight The Landlord. [1]

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.