In the MCU/Marvel with the Omnitrix/Ultimatrix - Chapter 23: Two Geniuses One Project

In a world where Spirit Summoners bond with legendary heroes to save civilization, I awakened as F-Rank—the absolute weakest.While my classmates summoned knights, saints, and mythic champions, my summoning glitched. The circle turned red, and when the smoke cleared, I was staring at the Tyrant Empress—a Calamity-tier villainess who nearly destroyed the world 800 years ago.Everyone calls me cursed. Dangerous. A threat that should be eliminated.They're right to be afraid.Because the Tyrant Empress wasn't the only one who answered my call.And unlike the others, my strength is forged in pleasure.Through forbidden dual cultivation with my villainesses, I grow without end.My name is Cade Marlowe, and I don't summon heroes.I only summon villainesses.

He is a legendary business powerhouse, a King with a business empire. She is just an ordinary female student. A deal, – a paper marriage, a marriage for four years. Four years later, she turned away fearlessly. She thought that their path would never cross again, but he took her in his stride and refused to let go of everything about her, even interfering with her getting close to other men!

“Luo Yibei, we’ve already divorced! We’re finished! Over!”

“Yeah?”

She had to ask what he meant.

And he shoved a small bun in her bosom with a look of disapproval.

- Description from Novelupdates

This is a time of great powers: The vast Persia, Sparta that was founded by force, Athens with its trade and business, Thebes the rising star, The ambitious Macedonia, The twin heroes of the Western Mediterranean, The rising Rome and so on.

This is an era of brilliant stars: Agesilaus II – the last king of Sparta, Epaminondas – the Rising General of Thebes, Philip II – the founder of Macedonian’s hegemon, Dionysius – the tyrant of Syracuse, Camillus – the Roman dictator and savior…

This is an era of contention among a hundred schools of thought: Plato – the great philosopher, Antisthenes – founder of cynicism, Pythagoras – school of number, Democritus – the encyclopedia scholar, Hippocrates – the father of western medicine, Aristophanes – the great dramatist…

What will the hero bring to the world when he comes to this age as a humble mercenary through rebirth?

10 years searching for his lost sibling.