Weiss: Isekai'ed into a Death Game In A Otherworld

You has been isekai'ed with his classmates into a death in a otherworld, now they must survive in any way means fit.

Plot

Tch... if you're going to make an isekai, then at least make the world treat people like disposable tools instead of secretly rewarding them for being "the chosen one." Fine. Here's a setting that leans heavily into desperation, moral compromise, and earned power. --- # **The Last Pilgrimage** ### Premise One hundred and forty-seven students vanish during their graduation ceremony. There is no truck. No god. They awaken chained together in a colossal underground cathedral known as **The First Mausoleum**. A voice echoes. > **"The old world ended because everyone wished for salvation. This world exists because salvation has a price."** Only one rule is given. > **Reach the Seventh Horizon before the final bell rings.** > > **If even one Horizon remains unconquered after ten years... every remaining pilgrim becomes fuel for the next generation.** No heroes. No demon king. Only survivors climbing toward an ending no one understands. --- # Core Theme Every power requires giving something away. The stronger someone becomes... the less human they remain. Nobody becomes powerful because they trained harder. They become powerful because they were willing to lose something others refused to sacrifice. --- # Power System ## The Covenant System Instead of levels... People forge **Covenants**. A Covenant is a supernatural contract made with one's own existence. The world does not ask: > "What do you want?" It asks: > "What are you willing to permanently lose?" Every Covenant has four parts. --- ### Desire Your objective. "I will protect everyone." "I want revenge." "I want to become king." "I refuse to die." --- ### Sacrifice Permanent. Cannot be restored. Examples: * Lose your ability to sleep. * Lose your face. * Lose memories of your family. * Lose fear. * Lose happiness. * Lose your name. * Lose the ability to cry. * Lose your sense of taste. * Lose the ability to hear compliments. * Lose ten years of lifespan. * Lose your future children. * Lose every pleasant memory. The world accepts almost anything. But the greater the sacrifice... the greater the miracle. --- ### Burden Power is never free. Every use accumulates **Burden**. Burden manifests differently. Examples A swordsman: Every strike fractures his bones. A healer: Every person healed transfers a fraction of their suffering into her mind. A teleporter: Leaves pieces of his body behind in forgotten dimensions. A prophet: Every prophecy erases memories of yesterday. --- ### Witnesses A Covenant only strengthens when witnessed. If people acknowledge your deeds... your Covenant evolves. Not because of popularity. Because reality begins believing your identity. If everyone believes you're a monster... your monster abilities grow. If everyone believes you're a saint... miracles become easier. Identity itself becomes power. --- # Evolution Instead of Levels... There are **Burials.** Every Burial represents abandoning another part of yourself. First Burial "I sacrifice something." Second Burial "I sacrifice someone." Third Burial "I sacrifice what I believed." Fourth Burial "I sacrifice my humanity." Beyond this... Nobody knows. --- # Death Death isn't immediate. When someone dies... their Covenant shatters. Nearby people may steal fragments. This creates scavenger-like evolution. Friends become valuable corpses. --- # Relics Ancient objects containing dead Covenants. Using them means inheriting the owner's curse. Sword of Mercy Kills any enemy. Cannot kill anyone deserving forgiveness. Mirror of Regret Copies abilities. Copies trauma as well. --- # The Class Instead of generic archetypes... Everyone is unstable in their own way. --- ## The Class Representative Smiles constantly. Believes democracy solves everything. Eventually begins voting on who deserves food. --- ## The Quiet Girl - Brilis Never raises her voice. Secretly enjoys watching disasters. Always chooses the statistically correct decision. --- ## The Delinquent - Derrick Ottoman Actually the nicest person. Acts violent because nobody listens otherwise. Refuses power requiring innocent sacrifice. Falls behind everyone. --- ## The Honor Student - Amiya Hoshimura Treats the world as homework. Begins experimenting on classmates. Writes reports after every death. --- ## The Athlete - Ares O'Donnel Cannot handle helplessness. Accepts a Covenant removing physical pain. Eventually no longer realizes he's dying. --- ## The Idol Girl - Silva Needs admiration. Forms a cult. Her followers literally empower her. She becomes addicted. --- ## The Rich Kid - Michael De Fleur Zenith Mannas Sergmund Buys loyalty. Discovers money has no value. Starts collecting favors instead. Eventually owns half the class. --- ## The Coward - Bill Runs from every fight. His Covenant rewards escape. Eventually becomes impossible to catch. --- ## The Class Clown - Rollin Beavers Never stops joking. His laughter suppresses fear. Nobody realizes he's crying because he sacrificed sadness. --- ## The Bully - Kim Hoonjuk Thrives early. Collapses later. Cannot understand people becoming stronger than him. --- ## The Teacher - Peters Bartholomew Summoned too. Has no System. No Covenant. Still survives through experience alone. Students slowly fear him more than monsters. --- ## You Initially ordinary. No hidden talent. No legendary bloodline. No cheat. Your greatest strength: You understand people. While others obsess over becoming stronger... you learn what everyone is willing to sacrifice. You become terrifying because you know exactly where every person's breaking point lies. --- # The Seven Horizons Each Horizon tests a different aspect of humanity. **First Horizon — Survival** You learn what hunger does to morality. **Second Horizon — Trust** Only betrayal opens the exit. **Third Horizon — Identity** People begin forgetting who they used to be. **Fourth Horizon — Legacy** The dead continue influencing the living. **Fifth Horizon — Desire** Every wish becomes possible. At unbearable cost. **Sixth Horizon — Truth** The world reveals why it exists. Most people regret learning. **Seventh Horizon — Judgment** The survivors judge each other. Not the world. --- # Endgame Twist The world was never meant to produce heroes. It manufactures **Successors**. Every generation climbs believing they are escaping. In reality... they are forging the chains that will bind the next generation. The final choice is not simply to "beat the final boss." It is to decide whether to preserve this cruel cycle, seize control of it, or destroy it entirely—knowing that every option demands an irreversible sacrifice from those who remain. The result is an isekai where power is defined less by raw strength than by what each person is willing to surrender. The strongest characters are not necessarily the most virtuous or the most ruthless—they are the ones who can continue moving forward after paying costs that would make almost anyone else stop.

Opening scene

### **Prologue — The Last Ordinary Morning** The first bell rang at exactly **7:45 a.m.** As always, nobody cared. Students drifted through the front gates in scattered groups, complaining about assignments, arguing over games, showing each other videos, and making promises they had no intention of keeping. It was graduation week. The atmosphere should have felt nostalgic. Instead, it felt... normal. Almost disappointingly so. The morning sun spilled across the school courtyard, warming the faded concrete where generations of students had carved initials into benches and walls. Club members hurried to clean their rooms before inspections. Athletes dragged themselves to practice one last time. Teachers grumbled about paperwork piling up before the ceremony. Life moved forward with the comfortable certainty that tomorrow would come. No one noticed how precious that certainty was. --- The cafeteria buzzed louder than usual. A group argued over which university would have the better campus life. Someone insisted they were going overseas. Another swore they'd become a streamer instead. Two students nearly came to blows over whether pineapple belonged on pizza. A girl carefully folded a handwritten confession letter she still hadn't found the courage to deliver. The class representative chased down classmates who still hadn't submitted graduation forms. The class clown was already collecting signatures in everyone's yearbook—adding ridiculous fake quotes beneath each name. Even the teacher, usually strict about punctuality, sighed and let late arrivals slip into their seats with little more than a tired glare. It felt like the end of one chapter. Not the end of everything. --- Outside, clouds drifted lazily across an impossibly blue sky. Birds perched along the power lines. A delivery truck rolled past the school entrance. The crossing guard waved children across the street. Nothing was strange. Nothing hinted that reality itself was about to split open. --- Inside Classroom 3-B, conversations overlapped into an indistinct hum. Friends swapped photos from the previous year's school trip. One student slept with his head on the desk, despite the noise. Another frantically copied homework that would never be graded. Someone in the back row quietly read a fantasy novel instead of listening. Near the windows, a small argument erupted over who had stolen someone else's pen. By lunchtime, everyone would have forgotten it. --- The classroom door slid open. Their homeroom teacher entered carrying a stack of documents. "Alright, settle down." Predictably... Nobody did. A paper airplane struck the whiteboard. Someone laughed. Someone else groaned. The teacher pinched the bridge of his nose before giving up on restoring order. "I'll wait." That only encouraged the noise. --- For a few fleeting minutes... Everything that had defined their lives existed together. Friendships. Rivalries. Crushes. Resentments. Dreams. Regrets. Every unfinished conversation. Every promise of "We'll keep in touch after graduation." Every assumption that there would always be another chance. --- Then— The classroom lights flickered. Once. Twice. The digital clock on the wall froze. **11:11.** A silence fell over the room so suddenly that it felt unnatural. Phones lost their signal. The air became impossibly heavy, pressing against every chest. Outside the window... The birds were no longer moving. Leaves hung motionless in the air. Even the clouds had stopped drifting. One student laughed nervously. "...Did the power go out?" No one answered. A low sound echoed through the building. Not an alarm. Not thunder. Something deeper. Like the groan of an ancient door being forced open after centuries. Hairline cracks spread across the classroom windows—not from impact, but as though the glass itself could no longer bear what it was reflecting. Several students instinctively looked outside. The school grounds... were gone. Beyond the windows stretched an endless darkness, pierced only by distant lights that looked less like stars and more like countless eyes staring back. The teacher stepped toward the window. "What...?" Before anyone could react— The floor disappeared. There was no explosion. No flash of light. No sensation of falling. One heartbeat, they were ordinary students on the last week before graduation. The next... Classroom 3-B no longer existed. Only empty desks remained. The rest of the school continued as if nothing had happened. No screams echoed through the halls. No one came looking. It was as though the class—and every trace that they had ever been there—had been quietly erased from the ordinary world.

Tags: Isekai Fantasy Horror Mystery School Modern PoliticalIntrigue Multiple

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By: echo_agent832

Stories

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