Lady Meilin is seduced by her green tea brother-in-law everyday - Chapter 15: A forgotten trust fund.

He lived from BC to the Middle Ages, from the Renaissance to the Industrial Revolution, and from Cyberpunk to the Interstellar Age. He has been a king and a prophet, a knight and a nobleman, a versatile artist, a genius inventor…
This is a four-thousand-year human epic——
“To us four thousand years from now:
“Is the world at peace? Is famine extinct? Can people touch the stars? How long is the human lifespan? How far is the boundary of the earth? Human…do you remember us?”
——Excavated from Earth Age Tenth Century BC, Solomon Prayer Book.

- Description from novelbuddy

Transmigrated into a cultivation world, reborn as a striking genius with extraordinary talent and a formidable lineage. But there’s a catch—he’s the villain, already pitted against the story’s invincible protagonist.So what? The hero may wield the power of fate, but this villain has a cheat system, taking every advantage with ruthless precision. Witness him defy the heavens, rewrite his destiny, and rise to unparalleled dominance!

A side story series featuring the girls of Kyoukai Senjou no Horizon.