I Became the Heroine's Evil Cousin

Yu Yan somehow transmigrates into the cousin of Gu Hanxiao, heroine of a rebirth novel, and becomes a spoiled, domineering, vicious supporting character. In the novel, the original owner sees the heroine's peerless beauty and graceful bearing. The heroine easily takes away all the affection that used to belong to her, and everyone in the household praises her without exception. So the original owner grows jealous and makes a habit of bullying her, opposing her at every turn and coming up with one frame-up after another. The heroine, reborn, easily avoids all of it. As a vicious supporting character, the original owner's ending is naturally tragic. Not only does everyone turn against her, she also dies in a mysterious drowning, all because she foolishly tries to compete with the heroine for the high-status male lead. Yu Yan, now transmigrated with the plot in hand, thinks: You have a golden finger, and I have the script. Maybe we can give it a try! After several rounds of sparring, Yu Yan discovers an even more effective winning move. One day, she throws herself into the heroine's full brother's arms. Yu Yan: "Waaah... Cousin." The heroine: Hah. That's it? Her brother: "Watch how you speak to your sister-in-law!" The heroine grits her teeth: Fine, you win! Theme: Study hard and make progress every day