After Dressing up as the Heroine's Sister, I Married the Villain

Si Qiqi, the beauty of University A, is also an agent of the K-State's MI36, codenamed 477. While performing a mission in the library, she accidentally opened the novel "The First Assistant's Beloved" and complained that the plot was illogical. As a result, she inexplicably traveled into the novel and became the biological sister of the heroine in the book. —————— In order to complete the task, she must survive until the finale, when the male and female lead give birth to a boy. Therefore, she fights green tea, practices, and catches monsters. She does everything she can to clear the obstacles for the male and female protagonists, and tries her best to bring them together, hoping to reach the finale as soon as possible. —————— Handsome Villain: "You always think about letting others have lovers and get married, but what about me? Have you ever thought about letting me have lovers and get married eventually?"