Hear My Heart: My World Falls into the River of Love - Chapter 57

A river song, triggered a legend of the rivers and lakes.
Tian Zun’s life motto: “My sword is the truth.”
Shen Lang’s life motto: “To serve people with morality, those who are dissatisfied are dead.”

- Description from uukanshu (translated)

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

In regards to the MMORPG Cross Reverie, Sakamoto Takuma boasted an overwhelming strength that was enough for him to be called the Demon King by the other players. One day, he gets summoned to another world with his appearance in the game. There, there are two people that insist “I am the real summon master.” Takuma gets slave-turning magic used for summoned beasts cast on him by the girls –

A small immortal clan, with the efforts of the ancestors of the past dynasties, slowly developed into an immortal clan. This is the history of the development and growth of a small family. During this period, there were ups and downs, and there were also struggles for power and profit.

- Description from novelbuddy