sin system: demonic harem after reincarnation

System! I always dreamed to have a system, to get out of my boring and shitty life. Surprisingly the day of my birthday I got one, but I was not the only one, the whole world received a system, and the people who were born in the 3rd day of September got a gift pack, and I was one of them. But the shocking thing is that we got a system notification that the earth will be invaded by another dimension in two weeks time and everyone should prepare for it. ------ Author's note ------ Hi everyone, I want to warn you about this novel there will be a lot of mistakes, English is not my native language (I am only using Google Translate), and I am not a professional writer. I am just an amateur of novels and want to put my idea to life. Please if you see a mistake kindly tell it to me in a comment and I will correct it. Thanks for your understanding.

There was once a guy that is indiferent and clueless about everything around him, but even though he was like this, if monster after monsters appeared at his doorsteps without any invitation at all, his eyes will glow with indifference and touch their rough bodies lightly, turning it into ash and get carried away by the wind that pass by. His name is Gabriel, A shut-in guy but is omnipotent. Read to know his story.

Talon is an orphan raised in an orphanage in Eryndor, a town in the Kingdom of Aurumia. As a citizen of Aurumia, Talon - like other children - always dreamt of becoming a great adventurer in the Great rift and after leaving the orphanage, he joined the adventurer's guild as a rookie adventurer. However, as someone who failed to awaken any abilities during his first golden stage and being that he was in Eryndor, a remote and uneventful town located in a safe and unimportant location with almost no dungeons or monster lairs, Talon's future prospect as an adventurer doesn't look very bright, and the pressing matter of his sworn sister's congenital illness was a source of dread for him. On a mission with other adventurers, Talon loses his life to a betrayal. Only for him to wake up to the notification: [Ding!] [Congratulations! You have been integrated with the Interdimensional Bazaar, the place where the infinite realities meet!] From then on begins his rise to glory as the “Strongest Adventurer".

He was a man who had nothing to his name nor anyone he could call a family. Just living as a corpse without any goal. He had lost all motivation to live and was just pushing the days because of a promise he made. 'Make sure to enjoy your life' He remembered the face of a woman who gave up her whole life for him. He looked at the rope in his hand, feeling disgusted at himself. He felt like his life had no motive. But that's when it happened. [The Necromancer System has chosen you] [The system is recommending you climb the Tower of Myth] [If you successfully climb to the top of the Tower, any one of your wishes will be fulfilled, no matter what it is] [Do you want to take the test of the Myth Tower?] [Yes/No] A reason for him to live appeared. The story of the One who had regained his will to live is about to start....

What would you do if you realized that, the recently acquired freedom is just another netherworld! That, the things you hated most are your survival guides! Would you wish for one more lesson, or, what would it be… James was a young man fresh from school. He had exorbitant optimisms of freedom and a very bright future. Only to realize, the so-called freedom was proving to be human under siege. Life in freedom was worse than perdition itself and got him a visit to the reformatory. He was an innocent determined young man, whom, life taught a lesson the hard way. Never loosing desire and motivation, he still pushed on hard enough. Had this to be you, would you do the same, or… just give up! Did he survive the harshness of the biosphere? Did his efforts ever get to pay back? Did he ever get to live his dream? Find out more about James, After the Shadows.

Tristan considers himself useless, from his career to his love all ruined because he was born with no conspicuous abilities and does not come from rich people. Until a system appeared before him, he would gain many abilities and make him a rich man. "With this I will have fun. I can do anything and become anything. I have a Career System Simulator that you don't have."

On his luckiest day, Oliver died feeling betrayed. The world on the day of death becomes a scary world. The zombies appear and carry out attacks on humans, Oliver dies by zombies with feelings filled with rage. When he opened his eyes again, Oliver knew he was alive before the attack began. Luckily, Oliver got an apocalypse survival system that could help him survive this apocalypse. Oliver gains strength and knowledge of what happened. He vowed that he would survive the unfolding apocalypse and only those he cared about would protect him.

Isaac, a 33 years old virgin, was living life watching anime and playing the dungeon-based game. When suddenly, a client reached out for him to gather information. As a publicly renowned, most dangerous man for his ability to gather information, he had to do his job begrudgingly even though he wanted to finish watching the last episode of his favorite anime. However, he still died at the hands of his client, who was not even aware of who he was. He did not regret what she had done, for Isaac only wished one thing before he died. Another life where he will live his life to the fullest in a world of fantasy. Inadvertently, his wish was granted by a system. However, he became a Mosquito? Come and let's join Isaac's Journey as a mosquito while he conquers even the world's largest, most dangerous dungeon!

Riko George, a student of Archeology, believes that in this world there are living mythological creatures. For Riko, they are not just fairy tales. As a result of Riko's passion for reading and watching fantasy films, a 22-year-old youth is desperate to go through the forest which is believed to be a gateway to another dimension. However, is Riko's assumption about mythological creatures really real or just a hallucination? Will Riko be able to prove to her friends her opinion?

Luck was never on Travis' side. He was bullied for being poor, fat and ugly. He also never felt the warmth of a harmonious family even though his parents were still complete. Being beaten and humiliated was his daily bread. He was also accustomed to getting a lot of bad luck. One day his bullies beat him up so badly that Travis almost lost his life. He thought, death is much better than living in misery. However, a system suddenly came to his help him.