I was reborn into a mafia novel world with the system help

In her first life, Selena Vale lived and died for the family that adopted her. She was obedient, elegant, and useful — the perfect daughter the Vale family proudly showed to the world. But everything changed the day they found their real daughter. Overnight, Selena became nothing more than a placeholder, a mistake they were finally free to erase. The love she thought she had earned turned into cold disgust. The parents she trusted abandoned her, her brothers framed her, and the real daughter smiled while taking everything Selena had built. By the time Selena realized she had never truly belonged, it was already too late. Betrayed by the family she called her own, she was murdered and left to die with hatred in her heart. But death is not the end. Selena opens her eyes in the body of a doomed side character inside a wealthy, ruthless story world — a girl with the same face, a ruined reputation, and a fate even worse than her own. Before she can make sense of it, a cold mechanical voice appears in her mind: System activated. Host must complete all assigned tasks to return to original world. Failure will result in permanent erasure. To survive, Selena must rewrite the plot, avoid multiple death flags, expose hidden enemies, and climb to the top of a world that was designed to crush her. Fortunately, the System gives her one forbidden advantage: a hidden storage space that can hold cash, medicine, evidence, rare items, and secrets powerful enough to destroy entire families. Then she meets Don. Cold, untouchable, and terrifyingly intelligent, Don is the one man no one dares provoke. He rules Dawn Estate like a king wrapped in silence and danger. He doesn’t believe in love, kindness, or coincidences. So when Selena appears in his world with eyes full of buried rage and a talent for surviving impossible situations, he offers her a deal instead of trust. A contract. He gives her protection, status, and power. She gives him loyalty, usefulness, and a role in a game neither of them fully understands. It should have been simple. But Selena is not the weak woman everyone thinks she is. And Don is not the emotionless monster the rumors claim. As Selena completes deadly system missions, uncovers plot secrets, and begins building the revenge she was denied in her first life, she realizes returning home may cost more than she imagined. Because the deeper she falls into Don’s world, the more dangerous the contract becomes. What starts as calculation turns into obsession. What begins as strategy turns into desire. And what should have been temporary starts to feel like fate. Her first family killed her once. This time, she will make them regret ever calling her daughter. But revenge is easy compared to one impossible question: When the system finally offers her a way back… will she still want to leave Don