My Multisystem In Isekai

Rex died betrayed. After spending three years sacrificing everything for his wife, Lucy, he was abandoned outside in the freezing wasteland when the Global Ice Age destroyed the world. His final sight was the woman he loved choosing another man over him. Then he opened his eyes thirty days before the apocalypse. This time, Rex knows exactly what is coming. But before he can prepare, a mysterious system awakens inside him. **The 100x Rebate System.** Every gift he gives can return a hundred times its value. A thousand dollars becomes one hundred thousand. Ten million becomes one billion. With infinite dimensional storage and thirty days until the world freezes, Rex finally has the power to prepare for the end. But survival is only the beginning. Because this time, when the apocalypse arrives, Rex won't be begging to enter someone's shelter. He'll own the world.

In his past life, Leonidas Vance was the Supreme Marshal of the Northern Front—a commoner who fought his way to the pinnacle of military command, only to be betrayed and executed by the corrupt Solar Emperor during the Great Demon Siege. Opening his eyes 10 years in the past, Leonidas finds himself back in his 18-year-old body: a disgraced, mana-less cadet exiled to the bleak Frostpeak Fortress. But this time, he didn't return alone. Bound to his soul is the Interstellar Sovereign Arsenal—a military system connecting him to the automated weaponry, orbital drop pods, and ballistic technology of an advanced sci-fi civilization. While arrogant noble mages rely on slow incantations and sword saints boast of bladed aura, Leonidas arms his starving garrison with armor-piercing assault rifles, anti-materiel sniper rifles, and heavy artillery. In a world where magic reigns supreme, the Reborn General is about to teach the empire that nothing breaks a spell barrier faster than a high-caliber round.

Ten years of blood, sweat, and iron—Aaron Holmes climbed from the abyss to become Lord Holmes, the youngest and most revered supreme commander in the nation's history. Standing before a million elite troops at his grand investiture ceremony, he is offered supreme glory. But a single, static-filled phone call shatters his world: "Daddy, please save me... they locked me in the dark."

[Ding! Host has successfully activated the Ultimate Deception System.] [Objective: Survive. Adapt. Deceive.] Zhao Fao transmigrates into the body of a youngster in a parallel Earth with a mysterious system. From then on, he sets out to uncover its secrets and dominate the world.

College had been nothing but hell for Wesley Quigley ever since he joined. Until one faithful night, while returning to his dorm after work, he got attacked by a wolf and thought it was the end of his life when he got bitten. However, that would turn out to be untrue as that'd only mark the beginning of his rise in college.

After his girlfriend and her secret lover took his life, Hikaru woke up in a parallel world — a nation shaped like Japan, familiar in all the ways that mattered, and dangerous in all the ways he had not yet learned to expect. Wraiths. Malevolent entities. Supernatural phenomena bleeding into everyday life without warning or apology. Armed with a Merit System and the hard-won skills of an Onmyoji, Hikaru had accepted that survival in this world would be complicated. What he had not accepted, and had not remotely planned for, was a wife. She was a Calamity of the World-Ending tier. A being so terrifying that humans and Wraiths alike trembled at the mere mention of her name. And yet. Every time Hikaru looked at her, the only word that came to mind was... So CUTE.

Synopsis: My name is Colton Ross, a devoted husband to Lisa Brown. In a world where the poor are treated like animals, I tried my best to be a responsible husband. I begged my wife to stay with our son, who was diagnosed with pneumonia, but she refused. She brought in a rich man on our matrimonial bed and had sex while locking our son inside the wardrobe! On our son's birthday, Lisa chose to serve me divorce papers, humiliating me for being broke and calling me a useless farmer. Not just that, Lisa disowned our son and warned us to stay away, as she is getting married to the new man she loves. She left with all my savings, claiming that it's her right to take my assets after the divorce, and I'm left with nothing. That's all I have. Without the savings, I'm unable to take care of Ray, and his health condition worsened until he landed in a coma. Watching my son at the brink of death, my heart burned with anger and revenge on Lisa for causing me so much pain. However, the life I hated changed unexpectedly when I met the female doctor in charge of my son's case. She gave me a condition "Marry me and I will pay for your son's treatment "

My wife ended our marriage with a smile and a disconnected oxygen tube. Her rich lover and my own family watched me die. They celebrated when it was over. I was the husband nobody wanted, sick, poor, and in the way. So they removed me. Permanently. But some graves are not as deep as they seem. And some silences are just the calm before the storm. I’m coming back. And this time, I won’t be begging for my life. I’ll be collecting theirs.

**100 days. That's all humanity has left.** Arjun Mehta was the last man standing when the apocalypse consumed Earth. After watching his family, friends, and billions of others die, he made one final sacrifice to protect the last human shelter. But instead of dying... He wakes up exactly **100 days before the apocalypse begins.** A mysterious blue screen appears before his eyes. **[Survival System Activated.]** This time, Arjun knows when every disaster will strike, where the first monsters will appear, and who will betray humanity. With every completed mission, the System grants him powerful skills, rare equipment, and the chance to evolve beyond human limits. As the countdown to the end of the world begins, Arjun must race against time to grow stronger, build the safest fortress, save those worth trusting, and uncover the terrifying truth behind the System itself. Because the apocalypse isn't the real enemy. **Something far more powerful is waiting for humanity to survive... or become its next prey.** **100 days remain.** **The countdown has already begun.** ---

Ethan Li is a young man who is desperate to save his gravely ill mother. With mounting medical bills and no viable options left, he finally reaches his breaking point. In his darkest moment he is granted the "Otherworld Exchange System." This gift draws the attention of the Department of Psychic and Esper Regulation, who mistake him as a newly awakened esper, and they offer him a choice. Work as one of their Agents as a "Hero" in the Otherworld or subject himself to having his powers stripped away. Seeing this as his last hope, Ethan dives into the Otherworld, where the rewards are great but the risks are greater. What price is too high to pay for power?