Strongest Survival by Otome Game’s Heroine (LN) - Chapter Volume 3 2: The Place of Beginning

Qin Ran just wanted to cultivate immortality, refine pills, and live a carefree life as an immortal world slacker. But a genius female disciple just had to get clingy, insisting that he take her as a disciple. Not only that, she was always making advances on him, thoroughly disrupting his peaceful slacker life…

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

There is an ugly beast that violates women in prison.

A treacherous beast that is feared and called a “Butcher”.

That’s me.

I was once a human but now I can’t even remember my own name.

I can’t speak, and I don’t understand a word they say.

It is in this deep loneliness that I am pouring my essence into the women everyday.

I pour my burning rage into them.

Over and over again, until they conceive.

From morning till night. Until the women’s souls withered.

To show them that I’m an excellent stallion and an obedient domestic animal.

But my soul has not perished yet.

I will break free from this prison soon. And when I do, it will be your last.

Every human who betrayed me, every demon who altered me, I will trample down like an ant.

And it won’t stop until I’m satisfied.

The dawn of the beast is near.

Humanity has been gradually transported to the Abyss by a bored god to compete against other races and monsters.The problem is… humanity failed. In a last desperate push the strongest survivors chose a comrade to travel as far as possible back in time.