Jiang Mingyue, a twenty-year-old college student, wins a fifty-million lottery jackpot only to slip and hit her head, resulting in her death and subsequent transmigration into the body of a fictional character in the novel The Blooming Rose. She awakens in a high school classroom as the vicious third female supporting character, Jiang Mingyue, who shares her name. A system named 118 informs her that she cannot return to her original world and must complete a mission to reduce the corruption level of the villainous second male lead, Qi Ze, from ninety percent to thirty percent. Qi Ze is the half-brother of the male lead, Qi Moyang, and suffers from a traumatic childhood involving parental abandonment, maternal suicide, and the death of his beloved dog at the hands of his stepmother. The system clarifies that Jiang Mingyue does not need to make Qi Ze fall in love with her but must instead help him experience genuine human emotions and heal his psychological wounds through sincere friendship.
Jiang Mingyue accepts her fate and begins navigating high school life, which is vastly different from her previous existence. Her initial interactions with Qi Ze are marked by hostility and misunderstanding, as the original owner of the body had treated him with contempt. However, Jiang Mingyue adopts a different approach, showing curiosity about his hobbies rather than aggression. She discovers that Qi Ze enjoys reading manga and playing mobile games, and she uses these common interests to bridge the gap between them. During a class duty session, she invites him to play a multiplayer online battle arena game, where she encounters a toxic teammate and publicly defends Qi Ze, earning his cautious attention. Their relationship begins to shift from adversarial to cooperative as they bond over shared activities.
The narrative takes a significant turn when Jiang Mingyue encounters dog thieves in a park while taking photographs. Qi Ze, who had been caring for a rescued Samoyed, confronts the criminals to protect the animals. Jiang Mingyue assists him by calling the police and physically intervening when one of the thieves attacks Qi Ze with a wooden stick, sustaining a minor injury in the process. This incident triggers a traumatic flashback for Qi Ze, reminding him of the death of his childhood dog. Jiang Mingyue comforts him by focusing on the safety of the rescued animals, which helps lower his corruption level. She decides to adopt the injured Samoyed and a stray Husky, naming them Xixi and Haha, and invites Qi Ze to visit them at her home. This act of kindness and shared responsibility marks a turning point in their relationship, as Qi Ze begins to trust her and shows glimpses of warmth.
Meanwhile, Jiang Mingyue navigates the complex social dynamics of her school, including conflicts with the male lead, Qi Moyang, who misunderstands her intentions and accuses her of secretly photographing him. She also encounters online rumors and slander targeting Qi Ze, which she actively counters by defending his character and reporting false posts. Her interactions with classmates, such as the gentle Liu Wenqi and the gossiping He Jiaqi, further integrate her into the school environment. As she continues to support Qi Ze through small gestures, such as sharing homemade desserts and gifting him a replacement camera, his corruption level gradually decreases. The story follows her efforts to balance her mission with her new life, as she seeks to heal Qi Ze’s darkened heart while avoiding the pitfalls of the original plot.
