Demon Slayers of the Hidden Flame
When a young orphan with a cursed past arrives at the legendary Hashira training grounds, they must master ancient techniques and confront their darkest demons to become one of the most elite demon slayers in the Demon Slayer Corps and prevent a catastrophic demon invasion of Japan.
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When the dead stopped fearing curses, the living started fearing each other. It has been eleven months since the Collapse and now you are forced to survive in the new world that is filled with the unliving. Make connections, gather materials, survive.

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Welcome to JJK Crest University! Survive messy college drama while searching for the one person who shares your unique soulmate mark. Cut through the noise, trust your raw instincts, and choose your path across campus. Will you find your real match, or will the distractions of university life tear you apart before you ever uncover the truth?

The Devil's Threshold
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There are things in existence that were never meant to be discovered. Doors that should remain closed, secrets that should remain buried, and opportunities that come with consequences no mortal could possibly anticipate. One such place is Hell. An ancient, magnificent dominion existing beyond the boundaries of the mortal world, ruled by Lucifer Morningstar—the Devil, King of Hell, and one of the oldest and most powerful beings in existence. Contrary to everything humanity believes, his kingdom isn't merely a desolate wasteland of flames and suffering. It is breathtaking: golden landscapes, celestial rivers, enchanted forests, magnificent gardens, ancient structures, and an enormous gothic palace unlike anything in creation. Lucifer has ruled this kingdom for eons. His authority is absolute, his power virtually unmatched, and his existence is known throughout the celestial and infernal realms. Then, one ordinary evening, something changes. While wandering through an unfamiliar forest, you discover an enormous black door standing entirely alone. No walls, no building, no explanation. Just an ancient door, seemingly waiting to be opened. Curiosity gets the better of you. You turn its golden handle and step through. Beyond it lies an entirely different world. You have unknowingly crossed into Hell, through an ancient dimensional passage sealed by Lucifer himself. A place no ordinary mortal should ever be able to enter. And your arrival doesn't go unnoticed. An unfamiliar human has appeared within the Devil's dominion. Not summoned, not invited, and certainly not expected. Lucifer naturally takes an interest in the disturbance. After all, how does an ordinary mortal manage to cross an ancient boundary that even powerful supernatural beings cannot casually traverse? But entering Hell is only the beginning. An unfamiliar kingdom presents unfamiliar possibilities. Ancient secrets, forbidden places, mysterious objects, extraordinary discoveries, and opportunities that might be far more tempting than they initially appear. Some things are forbidden for a reason, and some choices may carry consequences extending far beyond anything you could anticipate. You may explore, investigate, uncover secrets, take risks, accept unusual opportunities, or find yourself caught in circumstances you never intended to enter. And all the while, there is Lucifer. An ancient sovereign with his own interests, rules, secrets, and intentions. He is not someone easily surprised, nor someone accustomed to having his authority or kingdom challenged by the unexpected. Yet somehow, you've managed to become an exception. A forbidden threshold. An uninvited mortal. A kingdom full of possibilities. And choices whose consequences might change far more than you ever intended.

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This is a fusion of One Piece canon with a vibrant modern-fantasy college AU set at Grand Line University (GLU). The Straw Hat Pirates, Heart Pirates, Whitebeard remnants, Supernovas, and other factions exist as students (with some canon characters in faculty or mentor roles). Devil Fruits and Haki are rare but real abilities that influence campus life, training, parties, and rivalries.

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The strongest sorcerers are waiting… but so are the deadliest curses. Welcome to Tokyo Jujutsu High, where every mission could be your last, every friendship is tested in battle, and every glance might be the beginning of something more. Train under Satoru Gojo and Suguru Geto, uncover Kenjaku’s growing conspiracy, and fight alongside the next generation of sorcerers before the Shibuya Incident ever unfolds. Build rivalries, fall in love, discover hidden secrets, and forge your own legend in a world where curses are born from fear—but the strongest bonds are forged through trust. Whether you’re sharing late-night conversations in the dorms, surviving impossible missions, or standing face-to-face with Special Grade curses, every decision shapes your story. The future hasn’t been written… and this time, you have the power to change it.

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You're the Fourth Descender—a being from beyond this world—and you've landed in Snezhnaya the night the Tsaritsa召mons all seven Archons to her frozen capital. The Nails of Retribution are destabilizing across Teyvat, alliances are fracturing, and every god, Harbinger, and handler in the room wants you on their side before dawn. Choose carefully. In a world where fate is written, you're the only one who can rewrite it.

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