Reborn as the Male Lead's Cannon Fodder Ex-Wife

When Cheng Youyi woke up, she discovered that she had transmigrated into a novel as its supporting character, who shared her name, Cheng Youyi. She had been the beloved eldest daughter of the Cheng family, until it was discovered that she wasn't related to them by blood. She had been switched at birth. After the Cheng family's biological daughter, Cheng Siqi, came home, she targeted Cheng Youyi at every turn. Unable to bear it, Cheng Youyi lost her temper and slapped her by mistake, and was kicked out of the house as a result. To maintain her wealthy lifestyle, Cheng Youyi schemed to marry Zhou Jiayan, the president of Roushi, a man rumored to be cold and heartless. Though she gained money and status, she never won her husband's affection and lived in misery. In the end, she cheated on him and left with nothing. To make up for her "mistake," the heroine, Cheng Siqi, married him. When Cheng Youyi transmigrated, the heroine was mocking her for failing to win her husband's favor. In a fit of anger, Cheng Youyi drugged her husband's drink, unaware that this was the heroine's scheme to make her "cheat." So, after receiving the memories, she used the last of her wits to "help" her dear younger sister and bring about a happy outcome. Theme: