Sin System: Demonic Harem After Reincarnation

Lein has to pay for his mother's medical treatment, but he was fired from his job for an unreasonable reason. At the same time, his girlfriend betrayed him by sleeping with a rich man. This made him lose his reason to live. However, when he fell into despair, thinking that the world hated him, the system suddenly appeared in his vision, giving him a chance. "I was given a chance to take revenge on those who once looked down on me?!" Follow Lein's journey to become an invincible man.

Sardat Vettel is an errand boy for the Skull Gangster, who always has his pride trampled on. He rose from adversity after getting the Spin System. [Spin system installed! Today's Spin Prize....]

“Oh Richard, you can never be anything reasonable in life. You’ll die of cancer, and you’ll be forgotten.” Amelia spat, eyeing Richard gravely. Ding! [You have activated the Ultra Billionaire System] [You have been chosen as the new host. You have been completely cured of cancer.] *************** Richard thought his life would end when he was diagnosed with cancer and given a few months to live. His wife, Amelia, refused to help him with money for chemotherapy, and worse, Richard found her in bed with another man. When everything seemed to be going wrong, he activated the Ultra Billionaire System. With the help of the system, Richard was cured, and he returned for vengeance.

“Alessia, what’s happening here? Were you just making out with your boss?” He asked, his eyes widening in shock. “What does it looks like? Of course I was having a nice time with him. Compared to you, he’ll pay for my bills, the ones you were unable to meet up with.” She hissed. *** A young delivery agent who just lost his job, was on his way home. Though there was nothing to be glad about, he was ready to bless the heavens just for keeping Alessia; his one and only love by his side. It’s such a pity for him that he got brutalized and insulted by the same person he thought had his back. Disappointment was written all over his face as he stepped his foot out of that office. [Host Pharrell, this is the SIMPLING system, you have received ten thousand dollars, to be spent in the next two hours] Pharrell Crowley is ready to get to the top!

William's life as an orphan has been miserable since childhood. His life didn't change until adulthood; cheated on by his girlfriend, humiliated, fired from his job, and evicted by his landlord. However, his life changed after obtaining the Limitless Destiny System which allowed him to change his destiny to become whoever he wanted.

Framed for murder. Thrown into The Pit. Left to die. Kael Ardan was just another street rat in New Veyra, a city where the strong rule and the weak are nothing. But when betrayal sends him to the city’s most brutal underground prison, he’s given a single choice — die like the rest, or listen to the voice calling from the darkness. > “The Void has chosen you. Devour, evolve, ascend.” Bound to the mysterious Void System, Kael gains the power to absorb the strength of his enemies, upgrade his abilities, and shatter the rules of reality itself. From the shadows of the slums to the shining towers of the corporate elite, from battling street gangs to facing supernatural clans and interdimensional invaders, Kael will rise — and every level-up will be paid for in blood. In a world where power is everything, Kael is about to become the one name that even gods fear to speak.

Abel was beaten nearly to death by school bullies for daring to ask out the school belle. On the brink of death, he was saved by a mysterious entity, the Super Versatile System. It merged with him, granting him powerful skills and abilities. At first Abel thought he was special and is the only one with special abilities. That illusion shattered when he was exposed to the supernatural world. Even worse, his father was taken by powerful, unknown beings, and his fate remains a mystery. Dead or alive, no one knows. Determined to grow stronger and rescue his father, Abel swore to make the most of his new abilities. To upgrade his system faster, he had no choice but to join the entertainment industry as a boss figure. But when night falls, he becomes something else entirely, an executioner, hunting and killing the demonic beings that have escaped from another realm.

An honorable knight had just died on the battlefield, but his lost soul entered an empty body in another world. Living as the underdog Alexander, he surprises everyone with his prowess in wielding the sword relying on his combat skills from his past life. Not only his father, Baron Leville and almost everyone else in his family, but until King William VIII was impressed by Alexander. Getting so much attention in such a short and unexpected time, will definitely give some people jealousy. In fact, there are no exceptions for people who are blood relatives!

In a world where wealth is no longer just power but an unrelenting curse, Leo Xu wakes up to an impossible system lodged in his very soul: a boundless fortune of ten trillion dollars, all locked behind a singular, maddening rule — every cent must be spent on women. Not property, not power, not freedom. Only affection. Only seduction. Only simping. From luxury resorts that shift their architecture based on a woman’s mood, to jet-powered earrings that vibrate to the rhythm of heartbeats, Leo’s journey spirals into a romantic fever dream twisted by capitalism, affection, and social chaos. But this isn’t just a harem fantasy. It’s an emotional arms race where status, sincerity, and strategy collide in a brutal economy of love. Each woman he encounters — from the ice-veined celebrity genius Amber Lin, to the enigmatic heartbreak of his past, Bella Zhao — holds power far beyond their looks. And Leo? He’s just trying to survive long enough to figure out if all this love is bought, or if he’s being sold.

Far away from Earth, a sovereign dies, risking his life to protect all of creation. On Earth, the heir of a very prominent family dies by the machinations of unknown enemies. Either due to coincidence or something supernatural, the Sovereign awakens in the body of the deceased heir. Stuck with the memories of his past life as well as the life of the new body's previous owner, this Sovereign vows to mete out punishment to those guilty. With the aid of his System granting him a variation of arsenals at his disposal, Sovereign Yen will climb to the top to reclaim his place at the top as well as find the source of his second chance, the one known as The Supreme One!