Novel's Extra: The Lost Heir of Dragon Queen - Chapter 27: Justice?

The little handsome son-in-law passed through a world as waste material and the husband of a wealthy family. But because of his lacking aptitude, the wealthy family had driven him out. So he worked hard and found a more powerful family’s thighs to hold onto. Soon enough, he became the strongest son-in-law and husband in history.

In this world, it was impossible to practice martial arts. It was futile so he might as well take advantage of his wife’s thighs and maintain a comfortable and leisure lifestyle.

He’ll train his wife to become the strongest and best person in the world.

“Whoever dares to provoke me, let my wife kill you!”

- Description from Novelupdates

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

The Dao Court has ruled the world of cultivators for over twenty thousand years. The noble families maintain a strict hierarchy, making life difficult for independent cultivators.At ten years old, Mo Hua, who comes from a background of independent cultivators, struggles with his cultivation journey. This changes when a Dao stele appears in his mind.The stele is damaged and mysterious, but it can enhance spiritual awareness and help understand mystical formations.Mo Hua plans to use this stele to develop a supreme spiritual awareness, learn the secrets of celestial formations, and pursue the ultimate path of immortality. His goal is to change not only his own destiny but also the destiny of all lesser cultivators across the world.The path to greatness starts with the smallest steps, and the journey to immortality is long and challenging.Through dense fog and treacherous terrains, past horrors and chaos, where demons dance wildly, he must plant the seeds of his spiritual quest, survive the deadliest of trials, and prove his worth on every dangerous step…In the grand scheme of heaven, where the universe is the game board and all creatures its pieces, the strategic game of life and death begins, shaping destinies through its intricate moves…

The strongest hero of humanity, Kim Sung Bin.