"WE'RE NOT HEROES OF JUSTICE. WE'RE JUST TOOLS OF ORGANIZATION." Four orphan girls who are about to be captivated by the most deadly and dangerous organization and man that is well-known, Leon Carlos Del Pelagro, the most ruthless mafia. Their freedom and happiness as children will be taken from them at a young age, due to the fact that they have trained them to be assassins. Years pass and the girls ask Leon for their freedom and peace in living in a condition. Will they be free? What path awaits them? Will they find love when four brilliant NBI AGENTS men appear in their lives?

"I KILL FOR THE PRICE!" In a world where power rules and lines between right and wrong are constantly blurred, Rosella Dimitrea also known as "Pyre" a member of Nightfall maidens finds herself entrenched in a clandestine operation run by Chronos' feared top criminal, Kagar Vonstein. His reputation is so notorious that even the government turns a blind eye, leaving Rosella and many others to question their survival. However, her yearning for a simpler, peaceful life meets a stark challenge when Onse Theodore Windzon enters her chaotic world. Having shown interest in her since their initiation days in the Chronos Organization, his feelings took a drastic turn when he uncovers Rosella's damning act against him during her tenure as an assassin. Struggling with her dark past, Rosella has to face the results of her choices. Moreover, her heart is in turmoil when Onse's love still echoes in its depths. Will she overcome these trials and accomplish her dream of a peaceful life, or will her past as a ruthless killer forever tarnish her path? Assassins Collaboration Series