Seirei Tsukai no Blade Dance - Volume 18, Chapter 4 - The Princess Maiden of Water

In the King’s game, the [King]’s order is absolute and has the power to create rules. As the owner of a special physique, Gu Huai was selected by the system to participate in the game. “Win the game and become the [King], and you can obtain whatever it is you desire.”

- Description from Novelupdates

After the nuclear warfare, massacres started to spread throughout the entire world. The order between humans completely collapses, and the strong eats while the weak gets eaten becomes the #1 rule.

This novel is also known as Lady Is a Dragon

Five years ago, she left an egg and said, “This is the son I gave birth to you. When he grows up, it’s my return date.” He thought she was joking, but the son broke out of the egg a few months later. She looks like a baby, but there are two shiny, cute and cute little dragon horns on her head, but she has no return date.

*

Later, she disappeared for five years, and he also went crazy for five years, until Xiaolongzai brought back a woman, and he sobered up on the spot… But Xiaolongzai said: “Father, although you don’t have a wife, you will soon have a daughter-in-law. She saved me, and I want to make a promise to her!”

*

Since then, the father and son have fallen into open and secret struggles for favor.

“Your Excellency, Ms. Si’s medical skills have amazed the world, and big shots from all walks of life are fighting to spoil her. Your hero is useless to save the beauty…”

Mo Yinhe suddenly fell to the ground, coughing profusely: “Quick, call her to save me!”

“Your Excellency, the seven rivals who were tortured to the point of death by you are all Miss Si’s own brothers, and they want to take Miss Si back to inherit the throne…”

Mo Yinhe announced his abdication on the spot, and dragged his son to live on the street: “Son, from now on Dad can only follow you to your wife.”

The little dragon cub shook the shiny, cute little dragon horns on the top of his head: “Father, I have already contacted you with a nursing home, so that you can spend your old age safely~”

- Description from novelbuddy

Humanoid beast? Ahem…. Humanoid beast….