The Obsessive Second Male Lead Has Gone Wild - Chapter 10: There was no room in Rurutia to observe his ugliness.

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

“I am Bianca Valestra, Witch of the Frozen Night, an enemy of Humanity. By choosing to follow me, you will be fighting not just humans—but the entire world. I no longer wish to lie to you, Elian. If you wish to walk away or choose another path, I will let you.”Yet the boy shook his head and laid his hand gently over hers.“I am no longer human. I just committed what I think to be genocide. I am not afraid. For you—the one who saved me, gave me purpose, and my only desire—I will fight. I do not care how many come. I will kill them all.”___In the year 2030, everything changed.Portals to other dimensions appeared without warning.We called them dungeons.And from them came monsters that knew only destruction.But in humanity’s darkest hour, a sliver of hope emerged.People began awakening strange abilities—Talents—to fight back.Years passed. A fragile normal returned.Our story begins with Elian Reeds, a teenage student born in this new world—without a Talent.A Defect, they called him. Useless. Broken.That is, until he meets her.A fallen villainess whose name still strikes fear and reverence alike:Bianca Valestra—divine in beauty, and colder than death.This is the tale of their meeting.The chronicle of their journey.And the legacy of their triumph.

The eternal night is coming, and the killing ground descends.Gods fall, and a hundred ghosts parade at night.You can stand in the forefront and announce the arrival of the era's tide to the world, or you can hide in the darkness and coldly observe the struggle of others to survive.Liberate your thoughts, embrace your destiny, this is the absolute real game, this is, Earth's Killing Field.

There’s an ancient saying in Great Ruins, ‘Don’t go outside when it’s dark.’