MTL - The World That Tao Rules - Chapter 7489 this is the starting point

The Empress who dies in torture, An Rushuang is her name. After she wakes up, she finds herself has time-travelled to when she was twelve years old, but she would turn into Major General’s white horse at night. He is a general who orders about the winds and clouds on the battlefield, and she is a little girl lives in her boudoir seclusively.
She endeavors to change her fate, and he spared no effort to win every battle. They meet each other every day, well, it’s night to be accurate. Is that a dream or not? She pleads to marry the seignior to win peace for her family, only to find he is the one she is going to marry.
“Growing old with you under the same roof is my long-cherished wish”, thought them both.

- Description from Novelupdates

Ning Chu downloaded a western fantasy app called “Dragon Island” during winter break, in which you can raise various small dragons.

The game was beautifully drawn and unique, and the little dragon cubs are super cute and lovable, so Ning Chu quickly got hooked and raised a dozen of them with crazy funds.

The little dragon cubs vary in character and preferences, and Ning Chu works early and late every day, hunting and cooking, cutting down trees and building houses, sewing clothes for the little dragon cubs, playing with them, and singing children’s songs to put them to sleep.

Unfortunately, before the little dragon cubs grew up, Ning Chu met with an accident.

When he opened his eyes again, Ning Chu transmigrated.

He came to a strange and different world where there were wizards, dwarves, elves, half-therians, and… giant dragons.

Ning Chu was unlucky to have just crossed into a dragon slaying battle, where the huge creature raised its claws at him in the dusty atmosphere.

But… the red scales, the curved horns, and the hot flames coming out of its mouth…

This dragon, how come it was so similar to the cubs he raised?

——

Legend says that dragons are the product of God’s creation.

God favored the dragons, gave them great strength, a long life, and raised them personally. But from a certain day, the miracle disappeared and God abandoned the dragons.

The young dragon cubs lost their love and care, wailing in the cold night, stumbling to grow up, and eventually became ferocious and tyrannical dragons.

Later, God came again.

Ning Chu: oooh my cubs, daddy is back!

- Description from Novelupdates

“He” was originally a weak and pitiful “sissy”. Once reborn, he became an ancient martial arts genius with both medicine and poison. The national male god.

Don’t touch anyone who belongs to her, and she will hold what is not her, and she will never be merciless when she abuses scum and face.

He is a business genius who covers the sky with one hand in Huaguo. He has a dark belly and is decisive in killing. He is the only one who turns into a loyal dog in front of her.

She kills, he sets fire. She poisoned, he silenced.

One day, the pampered and lawless Lu Xingchen said in disgust, “Brother, they all say you are my dog.”

- Description from novelbuddy

This legend tells the tale of the protagonist, Kuroki summoned to protect the demon king from the hero.

Kuroki, unbeknownst to him, suddenly came to another world. He was summoned by the demon king, Modes. The territory which the demon king overrules was in the midst of being destroyed because of the hero. He had no choice but to bow before Kuroki.

“Please save us, Savior Dono!”

Kuroki nodded, deciding to save the demon king due to an unexpected turn of event.