Harem King System: My System is a pervert - Chapter 4: First Lessons

mc gets transmigrated to Fallout New Vegas with the merchant system. let the questionable adventure begin.

Joseph Knox, one of the most prolific and well-known serial killers on the planet.A person considered so demented and manic that even trying to reason with him was believed to be a waste of time. A man so far gone that he seemingly didn't deserve any pity even on his deathbed.So why? Why would a man like him receive a second chance? And why did the world around him seem so familiar?Disclaimer: AU when it comes to some parts of Madara's plan(I'll try to make it make sense at least), and aliens don't exist in this world

Qin Fen had once been abandoned and broken until, one day, he picked up a liquid metal ball that turned his life upside down.
This is the interplanetary era where Classical and Modern Wushu are competing. Classical Wushu enables followers to grow as powerful as dragons and elephants, whereas Modern Wushu enables followers to freeze monsters or even extinguish erupting volcanoes.
Qin Fen steps onto the stage of both Classical and Modern Wushu while belonging to neither. With the exquisite combination of both Classical Wushu and modern technology, he will pave a way to become a legend.
He is one of a kind, a favored son of heaven.

“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.