MTL - Master Quan Pets the Mysterious Wife - Chapter 171 a woman

A man reincarnates in the body of a boy who suffered a tragedy, only to realize that he is in the world of My Hero Academia. What's even stranger is that his quirk seems to have the abilities of Nen and Haki.

In the eighth year of the apocalypse, Qin Wu was betrayed and thrown into a pile of zombies.While dying, she regretted not taking a chance and pursuing her beloved man.After being reborn, Qin Wu only wanted to take revenge and pamper her beloved Mo Chenxuan.While he survived the apocalypse, Mo Chenxuan realised he was wrong. The person he truly loved was not his girlfriend before the apocalypse but the secretary who accompanied him through thick and thin.After he was reborn, Mo Chenxuan only wanted to dominate the apocalypse and make Qin Wu the happiest woman in the world.

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

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates