POWER_

Warning: 
1. MC is a mad hound.
2. The story is R-17.99 as the title suggests.
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Ansel of Hydral, the Empire's most notorious villain, devours a peculiar being known as a "Traveller". 
In doing so, he glimpses a future of despair, a foreordained future featuring a war-god who can shatter armies, a saint bearing great sins, a mage discerning the truth, and a heroine of unassailable morality... These formidable "she" would destroy his family, his empire, everything he holds dear.

Upon truly recognizing the cruelty and weight of fate, Ansel has an epiphany.

"If the Empire requires reform, then there is no need for a so-called protagonist. Armed with this knowledge, I can effect change far more efficiently."
"And as for you, the world's chosen ones..."
"If destiny dictates that you cannot be obliterated, then I have no option but to make you fall... fall with me to the very end of the abyss."

In essence, this is a tale of a villain rebelling against fate, taming the chosen daughters of heaven, all while orchestrating a transformative revolution in the world.

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Harem
No yuri

A Villain's Way of Taming Heroines

Within the grandeur of the castle, Cedric of Watson, warmly welcomed the members of the Tower of Babel. Despite their faces being mostly grim, he still endeavored to enliven the atmosphere.

"The inventions of the Tower of Babel, I have used quite a few. I must say, you all indeed possess extraordinary cognition and insights in the transcendental realm, especially in the application of basic ether... It has broadened so many levels and aspects, I believe many of them are capable of bringing about change—"

"Count," Ravenna interrupted him, "how many extraordinary beings can you bring to this war?"

"Those who can truly make a difference in this war, probably over two hundred."

Seeing that the other party had no intention of showing gratitude, Cedric could only respond with a bitter smile, "Including mercenaries, these are all the extraordinary beings I can muster."

Devil’s Companion - Two (II)