Oh My God! Earthlings are Insane! - Chapter 1939 Unbreakable Samsara

The world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeating her.

As the current decade’s Hexennacht approaches, a mysterious girl named Kagami Kagami arrives and meets Horinouchi Mitsuru, the daughter of the previous Hexennacht representative.

It takes place between Kyoukai Senjou no Horizon and the City Series, two other series by the author.

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

In the previous life, Jiang Peihuan was tricked by a scumbag and died tragically, which even caused her entire family to be wiped out.

When she was eighteen years old again, she was still the arrogant girl who refused to give in to her husband.

Her fiancé thought she had fallen into the water and lost her virginity, so he came to break the engagement and marry her cousin?

Everyone laughed at her, but she was happy to see the result: one hundred thousand taels of gold, I agreed to it.

After retiring from the engagement, it was rumored in the capital that she was abandoned when she was about to get married.

Unexpectedly, that unparalleled His Royal Highness Cheng Wang stood up: marrying her, why not?

Many well-known ladies’ spring boudoir dreams were shattered, but Jiang Peihuan was very moved and refused.

He is the emperor’s uncle of a scumbag, the youngest son of the late emperor, he looks suave and noble, but in fact he is ruthless.

She vowed to avenge her past life, protect her family and relatives, and did not want to have anything to do with the royal family.

But finally one day, she still accidentally became the envied Princess Cheng.

Jiang Peihuan recalled it, and became angry at the man lying beside him: Xiao Nanye, are you plotting against me?

His Royal Highness Cheng Wang, who was decisive in killing, couldn’t help laughing when he saw his concubine blowing her hair.

He whispered deceitfully, with a lingering voice: Forgive me, forgive me, I only want you alone in my life.

- Description from novelbuddy

Ten Years after the Descent to Earth of a Radical And All-Knowing System Called Arkadia, Life has changed in ways we could only surmise given we lived in a comic book. People with superpowers, Monsters, Heroes and Villains, Hell, there were even Other races coming out of the woodwork like Elves and such. Still, it wasn’t until The Extraterrestrials Invaded that things went from bad to worse.Yet, as if hope truly existed, 5000 of us Earthlings were given the opportunity to Head back into the past, only we didn’t know at the time there was a cost for doing so. By sending us back, the Descent Clock began, as Arkadia was pushed 10000 years into the Future, and it was up to us Returners to get things set back on course by changing the past to mold the Future.And I, being a boogieman of a Villian in what I dubbed the Origin Timeline, have come up with thousands of potential ways to affect my new life, like stealing popular franchises to earn some long-term funds or….hunting down notorious Serial Kills and Solving long-standing Cold cases I had been curious about since I was a teenager.