I Refuse to be a Supporting Character Novel

Gu Jin, an ordinary office worker, suddenly finds herself transmigrated into a novel as the supporting character and cousin of the female protagonist, Cheng Xin. Initially, the two cousins expect a lifelong friendship, with Cheng Xin surrounded by accomplished men. However, Gu Jin's new body carries memories of future events beyond the novel's original plot, revealing a devastating truth: her marriage to Shao Chong, the second male lead, will fail catastrophically. Shao Chong will abandon their marriage to pursue Cheng Xin, and on the day Gu Jin is kidnapped and beaten to death, he remains by Cheng Xin's side instead. Armed with this knowledge, Gu Jin refuses to repeat the previous soul's fate. She will not spend her second chance at life as a supporting character in her cousin's story, nor will she be a mere spectator in someone else's romance. Instead, she is determined to become the protagonist of her own love story.