Sexy Isekai: One Piece Most Wanted - Chapter 4 - : It Begins

A striking man of mysterious origin and peerless talent, he looks back at the world, in all its entirety, with utter disdain. And yet, in the treacherous and unpredictable ultimate formation of the Boundless Secular World, he guards a breathtaking ancient qin with broken strings, waiting silently for the destined one to arrive!

A goddess of another world who called herself Goddess Liliel gave a unique skill [Creation Magic] to the nameless protagonist who is going to be reincarnated into another world.

Although she had knowledge of Japan in her previous life, she couldn’t remember the specifics—-the girl who decided to call herself Chise, invented the [Seed of Magic] in order to increase her mana, and continued creating them with her increased mana.

The girl who obtained massive amounts of mana stopped aging, and eventually obtained perpetual youth.

The forever young loli cheat creation witch Chise brought her companion Tet, her golem daughter who can’t grow old, to become an adventurer, and traveled around various places in a different world with the safe land as a base that she personally created.

Waking up again in his seventh reincarnation, prince Jing Beiyuan found himself back in time, when everything had yet to be set in motion. Having been given a second chance, Beiyuan had to survive court and decide whether it was finally time for him to let go of his feelings; all while trying to handle the youthful, innocent force of nature who had suddenly barged into his already complicated life.

- Description from Novelupdates

I woke up in my sleep, and a strange door appeared in my home…Behind every door is a strange world.

In the nightmare world, Jiang Cheng added the news from the strong man to the fat man, and he almost cried when he heard the latter, “If you die here, the whole family will stand upside down and bleed?”

“Is such that.”

“Then I don’t think you are too scared?” The fat man widened his eyes.

Jiang Cheng turned his head and said in a very formal tone: “Because I am an orphan.”

- Description from novelbuddy