My Sister and I Are the Best

After Wen Yun travels into a book, she becomes the fake daughter of the Wen family. According to the plot, she should suppress her newly returned real sister, Wen Yishu, and become the evil female supporting character. However, her highly sensitive nature and overflowing empathy make her realize her sister is lonely and fragile, making it impossible to hurt her. Faced with the system's repeated pressure, Wen Yun instead activates her "protect sister mode," helping her sister integrate into the family, ward off malice, and rewrite their fate. A crying, kind-hearted fake daughter and a cold, strong real daughter join hands to prove that true family is not determined by blood, but created by love and protection.