Arifureta Shokugyou de Sekai Saikyou (WN) - Volume 3 Chapter 9

What if your own father and his mistress were behind your mother’s death? What if you were about to be sold off to a scumbag?

What would you do? In the nick of time, a tall, rich, & handsome guy descended from the sky and came to her rescue with a piece of contract.

Xin Qing glowered at the man before her. At first, she had thought of him as her Prince Charming, in the end, he turned out to be an evil demon.

“You’re not allowed to go. You can only marry me!” the man said viciously to the woman who was about to leave.

Xin Qing sneered. “Isn’t the ancestral behest the only reason you’re keeping me around? I’m just your tool.”

He said, “Who told you that?”, his eyes filled with profound emotion.

“You’re the mother of my child!”

- Description from Novelupdates

For a million worth of contract, she became a surrogate mother.

He was the chief executive of the Empire and she was of lowly birth. With her adoptive father’s business falling into crisis, she agrees to his contract.

She gave birth to twins: the older brother is healthy, while the younger brother didn’t breathe out. Fulfilling the contract with a huge monetary sum as the reward, she disappeared from his eyes.

Six years later – he was still the cold high-profile president, but when she is accidentally imprisoned in the cage of his golden birds he pressured her harder and harder: “Woman, do not think you can escape my hands!”

The old-fashioned man: “Mu Yazhe, you’d better leave her alone, this is the child’s mother!” The man becomes frightened, questioning the reason this child’s features bears such resemblance to…

- Description from Novelupdates

Within the virtual world of “Avalon Online”, Finn, or otherwise known as “Echo” within the game, was one of its greatest players. After logging off from a long session, however, he notices something awry outside of his apartment.The streets were flooded with chaos, screams echo through the night, and hell is loot loose. Monsters from Avalon Online are running through the streets, wrecking havoc. In the midst of this hellish awakening, Finn is greeted with the one gift bestowed to humanity in this dark hour:[...Assessing life experience…][Assessment Complete][Name: Finn Thorne][Age: 20][Designated Class: Assassin][Starting Level: 5][A [Legacy System] has been bestowed to you for your accomplishments within Avalon.][Assimilation System Awakened.]In this twisted turn, as the world as it was once known is gone with the arrival of magic and monsters, the remnants of humanity must level up if they wish to survive.Finn is left in this dark, hopeless apocalypse, using his own experience from Avalon Online to best survive what seems to be an impossible task.