Quick Transmigation: The Villain Boss's Right-Hand Woman

All Shen Xin wanted was to go home—but the "Strongest Lackey System" has other plans. Her mission? Serve the villain, antagonize the hero, and survive world after world as the ultimate sidekick. She accepts the deal… until she realizes she's not the henchman—she's destined to *become* the villain boss herself. And that mysterious man who keeps showing up in every world? He's supposed to be a nobody, yet he's always one step ahead, watching her every move. What game is he really playing?