'Lust system': Rise of the Harem lord - Chapter 9: Lilith

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

WARNING[R18]“I’m already engaged to him,” she blurted, her voice trembling but resolute.Her eyes shot toward the silver-haired man, the figure who had been watching her all along. Her heart pounded in her ears as she raised her hand, pointing directly across the room. The gesture felt foreign, like it wasn’t even her own body making the movement. But there he was, sitting quietly in the VVIP section, and she had to do something. Anything.All eyes turned toward her, and the room fell into stunned silence. The weight of a thousand gazes bore down on her, and the only sound was the frantic beat of her own heart as she waited for his response.***************Lilia’s life is turned upside down at a lavish masquerade party when an unexpected announcement claims she is engaged to Lowell, a man she has never agreed to marry. Caught between the overwhelming pressure of her parents’ expectations and the confusion surrounding her emotions, Lilia finds herself trapped in a web of deception. But when a silver-haired stranger named Zethan steals the spotlight, Lilia’s impulsive declaration sends shockwaves through the room. With her parents and Lowell thrown into chaos, Lilia is left questioning whether she has just freed herself—or unwittingly stepped into a more dangerous game of fate and manipulation.Who would have thought their futures had already been sealed? This vampire had been obsessed with her long before she ever knew he existed.

A story of Gin, a young man who lost his memories before the age of 17 and became a magician. Living a quiet life running a cafe while researching magic, he is suddenly thrust into an unknown world. Moving between Earth and a realm filled with danger and secrets, Gin must rely on his knowledge, skills, and magical prowess to navigate the perils that arise. Ruthless and determined, he will stop at nothing to uncover the truth behind his lost memories and the mysteries of the world, using every tool at his disposal to rise above all

After dying from a strange terminal illness, Ling Lan was reborn into a world 10,000 years into the future. Although she dearly wished she could just live a peaceful and uneventful life in her new healthy body, fate had other plans…

Forced to disguise herself as a boy just so she could inherit her deceased father’s premium military benefits, Ling Lan’s journey to adulthood was full of challenges. After much difficulty, she finally turned sixteen when she could drop the charade. But before she could grasp her newfound freedom to get married and start her own family, a twist of fate results in her being thrown into the Federation’s top military boys’ school.

With these twists of fate, Ling Lan had little choice but to walk further and further down a path of no return, one of cold and aloof dominance…

- Description from Novelupdates