Sin System: Demonic Harem After Reincarnation

When a ruthless alien tribe threatens to conquer Earth, one man must rise up and fight for the fate of humanity. Sunny Raven, a reluctant hero with incredible powers, faces his greatest challenge yet as he battles the alien invaders and confronts his own inner demons. But as the world around him descends into chaos and despair, Sunny discovers the true meaning of heroism, sacrifice, and the power of forgiveness. Can he overcome his own doubts and unite a divided world in the face of an extraterrestrial threat? Don't miss this thrilling system and sci-fi adventure that will keep you on the edge of your seat from beginning to end

Alex once stood at the very apex of the Tower, on the verge of ascension—until he was betrayed by the comrades he trusted most. Death should have been the end, but instead, he awakens reincarnated several months before the Tower’s rise. Armed with knowledge from his past life, Alex enters the Tower once more, growing stronger with every step. This time, he climbs with two clear goals: to reach the summit again and uncover what lies beyond the Tower’s peak, and to exact revenge on those who betrayed him.

Bullied by a group of delinquent students, then fired from his part-time job for offending the family of those delinquents. Ryu Arkan felt tired and wanted to take revenge. At that exact moment, a system appeared. [Super Quest System.] The system instantly merged with Ryu, and slowly Ryu rose up, then realized one thing. His world was truly dark and needed to be fixed. Starting from revenge, Ryu stepped higher and higher together with the system.

Rick had just woken up from a comma after he and his friend tried chasing down one of the most dreaded underlord in the city of Rochester. Thinking he had captured Lord Patrick who was popularly called Demon king. Rick was shot, the last thing he could hear was the walung sound of the ambulance as Mark tried to stop the bleeding. " Stay with me man, you are going to be okay."Mark shouted at Rick trying to have him open his eyes. As the ambulance got closer his eyes closed and was open after three years of him going into comma. Rick had woken up to his worst nightmare. Rick looked at his ward and saw the flowers had withered and there was no one in his room. Suddenly a system. appeared right in front of him. [ YOU HAVE BEEN SELECTED TO CARRY IN THE LIFE OF HUMANITY. WITH THE HEO OF THE ENIGMATIC SYSTEM YOU CAN CHOOSE ANY WEAPON TO FIGHT AND ALSO HAVE THE CURE INSIDE YOUR SYSTEM. PRESS YES/NO] Rick looked at this system and pressed yes. Read on how Rick plans on helping humanity rise to itself while battling the Zombies to get back to his family and loved ones.

Little Sky, an earthling human, is the lowest ranking Knight on earth, regarded by many as the weakest Knight in existence. Little Sky has always hated that he was weak, he trained harder than anyone did, but that didnt change his status of being weak. Little Sky has always been disdained and look down upon by other Knights, they would always laugh and teas on how weak he was. He had thought of quitting so many times But, burdened by his mother's hospital costs and a big loan which is said to be left to him by his father, he had no alternative but to risk his life every day inside the demon grottos, despite his limited strength, which could barely kill the weakest demon. But all that changed when he activated the crazy Devouring system, which granted him the most powerful constitution in the universe; endless evolution, as well as the ability to devour everything. Sky would go from being the weakest to the absolute strongest, saving humanity and the entire universe from the catastrophic demon invasion. with his system nothing in this universe could stand in his way.

Jin returned from another world. The dead rise and eat the living. Without a way out, he accepts his fate and lets the undead eat him. “Was that… Me? Or rather, my body? W-What happened to me…!” [Do you want to activate the Undead System?!] A/N Many thanks to Sera Execfia for the gorgeous Cover art.

Matthew Wilson had to die after being crushed by a truck. But suddenly, he found himself in the body of Dominic Rayn. In Matthew's opinion, Dominic Rayn was a brave and honorable man. However, he was just a poor, useless son-in-law who had been betrayed and often targeted for manipulation by the powerful and wealthy people in his life. Living in his way was horrible. Imagine Matthew's life at that time. But the system became preoccupied with Matthew after he came back to life in Dominic Rayn's body. This system, known as Trivia, had an infinite balance and was ready to grant Matthew eternal balance if he successfully completed a scenario. And in Matthew's new existence, Trivia has given him many opportunities to act in a way that will give him infinite balance and show that he is no longer a weak and easily manipulated man or an annoying son-in-law.

In this world where monsters and magic exist, there are all sorts of things inexplicable with science. Lee Woo was a famous scientist in his old world until he got sent to a monster world where science doesn't exist so he will make it exist.

A hundred and sixty years after the dragon bloods attacked the earth and a mysterious stone shattered, granting humans abilities, Mason Blackwood is one of the few to not have awakened abilities. But after a night of being chased by neo-thieves and falling off a cliff, Mason unlocks the demon system, allowing him to grow strong as he unlocks more skills. And through the system, he discovers that a second war is coming. A war between the humans and dragon bloods and one that might perhaps wipe out the entire human race. And this time around, he might be the only one who can stop it.

Jace Barnes was a typical, unlucky youth; he had lost both his parents in a tragic accident and his younger sister died from overdose. Tired and depressed, he lived each day like a mindless robot. He couldn't continue with college so he dropped out, pulled some favors which found him a job at a local restaurant, but that also ended due to his lackluster performance. On the day he was fired, he was hit by a speeding truck and died instantly, his last emotion being relief at the thought of the torture of living alone and hopeless finally over....or so he thought. Opening his eyes again, he found out he had transmigrated into a new world, one vastly different from his old one; with tales of Elements users and Monsters, Lords and Queens, Kingdoms and Empires and Dungeons and The Nether-realm. For the first time in a long while, Jace felt something snap in him, he wanted it all, he wanted to become something, to conquer something, and the desire for greatness awoken something in him...the Oasis System. Will he conquer Demons and Monsters, dominate Empires, or will he get swallowed by the ever raging dominance of the new world?.