MTL - My Post-Apocalyptic Shelter Levels Up Infinitely! - Chapter 321 Final test! Last chance!

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

Anastasia Harrison, a young woman abused by her cruel family, thought her life was over when they forced her to marry Richard, the sleazy black sheep of the wealthy Wallace family. Meanwhile, her favored younger sister, Michelle, was set to marry Xavier, the elder brother, who was a CEO.Yet, an error at city hall ended up swapping their names on their respective marriage certificates.“What is this?! How are you married to Xavier Wallace?”“You're not getting any food or water until you sign the divorce papers!”To add fuel to the fire, the old Mr. and Mrs. Harrison passed away, leaving all their assets to Anastasia and not the rest of the family. This drove the Harrisons to their breaking point. To trade for a peaceful life, Anastasia was willing to leave her inheritance and leave the family, but the Harrisons had other plans in mind.They wanted to get rid of her. Permanently.However, it was by a stroke of luck that Anastasia was found by her new husband, Xavier, before her family succeeded. Determined to get her revenge, she struck a deal with Xavier.“Continue to be my wife and I will help you get your revenge!”

An otaku with a hobby of masturbating was reincarnated as the son of a great mage.

As soon as he was born in this life, he vowed with a goal of embracing women till his death.

That said, when he became 20 years old, the Demon Lord which was sealed by his ancestors revived, and now it is his role to seal it once again.

And that demon lord is sealed in a tower dungeon that is rumored to be impossible to capture.

However, by an unexpected coincidence, he had found out that the Demon Lord is also one of him, a kindred spirit from within,

so he joined her instead and filled several traps in the tower dungeon, and thus they enjoyed a s*x spree with all the women coming over!

Xia Ning is betrayed by her boyfriend who wants to marry another girl from a rich and powerful family.