Sin System: Demonic Harem After Reincarnation

[SYSTEM ACTIVATION IN 1... 2... 3] [HOST'S REINCARNATION REVENGE SYSTEM ACTIVATION HAS BEEN COMPLETED SUCCESSFULLY] ***** Ethan Wills gets bullied, betrayed, humiliated and heartbroken by everyone around him. The only person who could love him gets killed by his worse enemy and it breaks him to the core. Just when he was trying to make a point, he gets beaten and killed but before he dies, he wishes for a second chance at life and that instantly got him a system. This time, he isn't coming back as the broke ass weirdo, nor a weakling... He is coming back as the GOD OF REVENGE but not alone, he's coming back with his REVENGE SYSTEM: RRS.

Pan was adopted, then treated like a servant for eleven years by his foster parents and sisters. A perverted system wakes in him and gives him the power to subjugate everyone who bullied and mistreated him. His mother, sisters, professors, classmates. This is not a love story. This is a takeover of the world.

Robin doesn't remember how to he got taken into that world. But the System will not let him go unless he progresses with the story and unravels a new change. Transmigrated into the body of Terrence Blair, a weak NPC who has no standing in that world whatsoever, he has to make himself known to the main characters so that he can hitch a ride to the end game.

Congratulations! You've been chosen by The Demon Lord. Daemon read these words in the brink of death. Getting bullied everyday and having nobody he can call an ally, he's always been an outcast - shunned by society. Hated by all. But all of that will now change. With the ultimate system given to him by Astaroth himself, Daemon can begin his revenge. Plunging into the depths of malice and deprivation, Daemon activates the DEMONIC REVENGE SYSTEM!

The world ended in a single night. A mysterious virus swept across the globe, turning billions into flesh-hungry monsters. Governments collapsed. Cities burned. Civilization vanished. In the new world, food was worth more than gold. Water was priceless. Trust was extinct. Just when Ethan Kane thought he would die like everyone else, a strange voice echoed in his mind. [Infinite Rebate System Activated.] [Gift supplies to designated female survivors and receive rewards multiplied by 100 to 1000 times.] Gift a bottle of water? Receive a warehouse filled with premium supplies. Gift a handgun? Receive legendary weapons capable of killing mutant kings. Gift a safe shelter? Receive a fortified fortress city. While survivors fought over crumbs, Ethan's resources multiplied endlessly. As zombies evolved, monsters descended from dimensional gates, and powerful factions rose from the ruins, Ethan built the strongest survivor kingdom in existence. A kingdom protected by beautiful and powerful women. A kingdom feared by enemies. A kingdom destined to rule the apocalypse. And at its center stood one man. The King of the End Times.

i took my own life expecting anime style reincarnation but little did I know the harsh truths about the gods and reincarnation process

Richard ‘Ric’ modern-day military General dies in an accident and awakens in the body of a poor conscript in the collapsing Starlight Dynasty, a kingdom ravaged by famine, corruption, and endless war. On the very day he arrives, a royal decree is announced: “Every man drafted into the army must choose a wife before deployment to preserve the bloodline of the kingdom.” But because the war has lasted for years, countless women have been abandoned, widowed, or labeled “undesirable.” Most men choose young and healthy women, leaving the rest to starvation or slavery. While others fight over beauty, Ric notices three women sitting silently in the corner: a cold former noblewoman accused of bringing misfortune, a quiet village healer rejected for her frail body, and a fierce chained bandit girl awaiting execution. Mocked by everyone around him, Ric shocks the entire registration hall by choosing all three as his wives. The moment he does [Dynasty Survival System Activated]

They tagged me trash unworthy of a legend's legacy. So I became the devil seated on the throne. ****** They called his father a saint. And called him a disgrace. Theon Dravorn is eighteen, powerless, and hated. On the day he demands his father’s legacy from the archmage who stole it, he’s branded ungrateful and cast into the Netherworld Spirit-Devouring Wasteland to die. He doesn’t. The ASTRAL VILLAIN SYSTEM binds to his blood. It promised strength, demanded evil, and bred scorn. Each mission feeds his power with hatred, resentment, and blood. Refuse, and it kills him. Obey, and he becomes the demon his father died fighting. Now Theon learns the truth: Ren Dravorn didn’t fall as a martyr. He was murdered. And the killers wear halos in the Celestial Realm. To avenge a saint, Theon must become a monster. The only question is how much of his soul he’ll burn to get there? [For fans of morally grey cultivation, demonic systems, and sons who inherit war instead of peace.]

A strange explosion in the middle of a park granted me with a bold new power- THE ABILITY TO SUMMON A MECHA TO FIGHT WITH! But that's not all, because the first time I equipped my mecha I felt a strange connection spring into being and now... the bigger I make my harem, the stronger I make my mecha!

Getting backstabbed and betrayed, Angus is thrown over the rooftop by his own brother. When he thought his life probably ended, he finds himself reincarnated as Idris Beaufort who's not only weak, cursed but also severally sick. In this life, he vows to grow stronger, make those suffer who bullied him and his family, take what is supposed to be his and show the world who is the true King. Can someone as weak as Idris can overcome all the difficulties and rise to the top?