Reborn on the Day of My Betrothal: I'll Marry Your Father and Become Your Mother

Jiang Wanning, the legitimate daughter of the Marquis Manor in the Eastern Ling Kingdom, endures a horrific death in her previous life. Betrayed by her father-in-law Pei Yanchuan, her fiancé Pei Anqing, and her own concubine-born sister Jiang Wanru, she is tortured and killed in a dungeon. Jiang Wanru reveals that Pei Anqing never loved her; he pursued her solely to revenge against Pei Yanchuan, who had stolen military merits from Pei Anqing’s biological father. Furthermore, Jiang Wanru orchestrated the deaths of Jiang Wanning’s entire family, including her parents and grandfather, to seize the Marquis Manor’s wealth. Just as Jiang Wanru kills her, Jiang Wanning is reborn, waking up on the day of her betrothal to Pei Anqing.

Upon realizing she has returned to the past, Jiang Wanning resolves to change her fate and protect her family. During the betrothal celebration, Jiang Wanru stages a scene by falling into a lake, pretending that Pei Anqing saving her compromises her virtue. In her previous life, Jiang Wanning had begged for Jiang Wanru to marry as an equal wife, a request that led to her downfall. This time, Jiang Wanning publicly slaps Jiang Wanru and exposes their affair by producing secret letters that Haitang, a loyal maid, retrieves from Jiang Wanru’s quarters. When Pei Anqing and Jiang Wanru feign remorse, Jiang Wanning demands they marry each other, but Pei Yanchuan, the Prince of Langya and Pei Anqing’s father, intervenes.

Pei Yanchuan issues an Imperial Decree stating that the future Princess of Langya must be Jiang Wanning. To prevent political turmoil and protect the Marquis Manor from being implicated in Pei Anqing’s scandal, Jiang Wanning proposes a shocking solution: she will marry the Prince of Langya, Pei Yanchuan, while allowing Pei Anqing and Jiang Wanru to wed. She argues that since the decree only specifies the title and not the groom, she can fulfill her duty by marrying the Prince. Pei Yanchuan, suspicious of her motives but bound by the decree and his own hidden feelings, agrees. Jiang Wanning becomes the Princess of Langya, effectively making Pei Anqing her stepson.

Jiang Wanning immediately begins to dismantle the threats within her family. She reclaims household management from Concubine Liu, Jiang Wanru’s mother, and restores her mother’s health by identifying the poison she has been fed for years. She also visits her maternal grandfather, the Grand Preceptor, discovering that Jiang Wanru had been neglecting and poisoning him to weaken the family’s support network. Jiang Wanning executes the corrupt servants and replaces them with loyal staff, ensuring her grandfather’s safety and comfort.

As she navigates her new role, Jiang Wanning learns more about Pei Yanchuan. She discovers that he is not actually thirty-three but twenty-three, having faked his age to secure his title. He suffers from a chronic poison that shortens his lifespan, a secret Pei Anqing exploits by sabotaging any attempts at a cure. Jiang Wanning, who knows the location of a healer capable of saving him, decides to use this knowledge to secure her position and protect Pei Yanchuan. Their relationship evolves from a political arrangement to a complex alliance, with Pei Yanchuan growing increasingly protective of her as he realizes her intelligence and strength. Meanwhile, Jiang Wanning continues to outmaneuver Jiang Wanru and Pei Anqing, stripping them of their influence and preparing for a final confrontation that will expose their crimes and restore justice to her family.