Martial King's Retired Life - Chapter 23Book 15:

This is a story of crime, scandal, and romance.

Sam Sanderson is envied by many for his job, however he himself didn't seem to like it much.

Due to his expertise in nanotechnology he was tasked with monitoring the state the Valkyries, humanity's strongest weapons who all just happen to be made into gorgeous females.

Forbidden from even touching any of them, Sam spends his days in agony watching flowers he couldn't hope to touch. However one day all of that seemed to change.

Driven by his need for revenge, Lazarus, the Lore’s most ruthless vampire, plots to seize the throne of Wilyra and rule it along with his betrothed, the fae goddess Maeve who thrives in a borrowed body.

Lazarus has a perfect plan—until he finds Emmalyn, a young mortal who is the daughter of the rebel leader of blood vassals in his kingdom and an integral part of his plan. He captures the young girl to cast her soul out for Maeve.

Emmalyn yearns for a better life to escape from her stepmother and an indifferent father. She never imagined that they would sell her to the royals to save her brother’s life.

But there’s only one problem. Emmalyn tempts Lazarus beyond reason. As the time to cast her soul out draws closer, he must choose between his lust for the throne or his irresistible mortal.

Will Lazarus succumb to lust for power and crown? Or will he risk it all to have a future with her?

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