Naruto: The Outsider's Resolve - Chapter 2.1 (052):

[Reformatting World Settings...][Real-World Currency Disabled.][Physical Laws Adjusting to Game Protocols.][Initiating Player Culling Sequence...][All Players Age 60 and Above Will Now Be Eliminated.]A blue screen appeared before every person in the world, displaying those chilling words.At first, many believed it was some kind of elaborate hologram prank—until every person aged 60 and above disintegrated into glowing particles.But that was only the beginning.The world had changed. Humanity had been turned into “players” in a twisted system where survival meant leveling up through killing others or completing brutal quests. Fail to level up in time—and you're dead.Shinra Takamura, a 20-year-old survivor in this new Filthy World, receives a rare skill Lewd Reap: the ability to steal another player’s ability through intimacy.But can he survive the chaos, the betrayals, and the moral decay with such a controversial power? Or will the world break him before he ever learns how to use it?Read on to find out.This book is a smut novel with a solid plotline, set in a world of survival and extremely gory scenes. The main character is no goody two-shoes—he’ll do whatever it takes to survive. He’s not evil, though; he doesn’t kill without reason. The story begins with his transformation, showing how a once-good kid was shaped by a brutal world into the person he is now. Hope you find it interesting (:->

There was nothing left to lose in his life.He had lived as a hero. He had started at the bottom and worked his way up to the top, at the end he become the best, yet he had always been betrayed by those he had tried to protect.Humanity did not deserve his protection.When everything went out and he could no longer even hope to beg for his life, he could do nothing but look up at the blood-red sky among the corpses of demons and angels.He wished for one more chance, just one more chance.And when that chance was given to him, he swore that he would change everything. He would no longer be a hero to save people, but an anti-hero to save the world.Sacrificing hundreds of people to save an elf, poisoning hundreds of people to save a group of half-demons.He didn't care about any of that anymore, he would protect those he cared about and send everything else to hell.Not even the gods or goddesses could stop him.

The ordinary 18-year-old Edo, during a nighttime walk, finds himself in a fantasy world where he gains a mysterious power that could shape his destiny.

The King of Hell sentences you to death by midnight, but I can ensure that you live past morning.

The young man, Qin Lang, received the inheritance of a poison school by chance. He uses poison to kill people, uses poison to save people and he uses poison to chase beauties. With body of ancient extinct poison and a body of a martial artist, he walks around the city, and wanders around in the underworld.

- Description from Novelupdates