Reborn as the Cannon Fodder Mom of the Male Second Lead in a Historical Novel

Su Yuanhua, a twenty-three-year-old mother who died protecting her young son from a violent criminal, awakens in her nineteen-year-old body on March 8, 1976. She finds herself in the body of a girl with the same name, who is also sick with a fever. A strange entity, System 001, informs her that she is an anomaly in a fictional world based on a novel called "The Little Koi Wife of the 90s." The system explains that Su Yuanhua is a bug in the program and that her original destiny was to marry Gu Rong, a military man, and raise their son, Gu Wei, who was destined to become a tragic second male lead. However, Su Yuanhua refuses to accept this fate, determined to protect her son and live a life of her own choosing.

In her previous life, Su Yuanhua had sacrificed herself to save her son from a psychopathic killer at a kindergarten. In this new timeline, she wakes up on a day that was pivotal in her past life: the day her father, Su Shengquan, broke his leg while trying to stop a village fight over water rights. This injury had previously led to a debt of gratitude that forced the Gu family to send their son, Gu Rong, to marry Su Yuanhua. Determined to change her destiny, Su Yuanhua rushes to the scene and intervenes, saving her father from injury but causing Gu Rong's father, Gu Dongfeng, to be injured instead. This alteration disrupts the original plot, as the debt of gratitude is no longer owed, and Gu Rong is not compelled to marry her.

While recovering in the hospital, Su Yuanhua encounters Gu Rong and his family. She feels a strong aversion to him, remembering the hardships of her previous life as a military wife and the tragic fate of her son. Gu Rong, unaware of her past life, is confused by her coldness but remains polite. Su Yuanhua's mother, Cui Lanye, notices her daughter's discomfort around Gu Rong and decides to keep them apart, fearing that her daughter might develop feelings for him. She encourages Su Yuanhua to focus on her studies and future, rather than marriage.

System 001 reactivates and reveals that the second male lead, Gu Wei, is missing from the timeline. Su Yuanhua realizes that her actions have prevented the birth of her son, who was destined to be the second male lead. The system warns her that the storyline is collapsing due to these changes, and she must help restore the plot or face the consequences. However, Su Yuanhua refuses to let her son be used as a plot device. She decides to use the system's abilities to her advantage, asking it to help her find water sources for her village to improve their lives.

With the system's help, Su Yuanhua identifies locations for digging wells, which alleviates the drought in her village. Her actions earn her the respect of the villagers and strengthen her father's position as brigade captain. Meanwhile, Gu Rong returns to his military duties, and the two families drift apart. Su Yuanhua continues to navigate her new life, determined to avoid the pitfalls of her previous existence while keeping the system's warnings in mind. She plans to gather more information about the novel's plot to make informed decisions that will protect her and her future family.

As Su Yuanhua settles into her new routine, she faces the challenge of balancing her desire for a different life with the system's demands to maintain the storyline. She begins to form alliances with her family and friends, including her cousins, who support her endeavors. The story follows her journey as she seeks to rewrite her destiny, protect those she loves, and uncover the truth about the world she now inhabits.