My aunt is five and a half years old

Gao Luo accidentally discovers that the world she lives in is actually an entertainment industry-themed novel.

Good news: She is a minor character from a wealthy family, which means she has money, leisure, and is not controlled by the plot.

Bad news: To prevent her from revealing spoilers, the system activates a defense mechanism, shrinking her into a five-and-a-half-year-old.

No one takes a five-and-a-half-year-old's words seriously.

Gao Luo comforts herself, thinking that being small isn't so bad—no academic or work pressure, no complex social relationships, and no need to diet! She can eat whatever she wants!

Until one day, her socially anxious niece, who is struggling in the entertainment industry, comes to her for help.

Gao Shule is a cannon fodder character in the book, socially anxious and quiet. As a comparison to the main female lead, she participates in the same children's variety show. The female lead excels, while Gao Shule and the child she's paired with are criticized, leading to her tragic end in the original story where she is abandoned by the market and commits suicide after being forced into "social engagements."

Gao Luo, seeing her niece and feeling a sense of kinship, decides to help her.

On the set of the variety show, the five-and-a-half-year-old Gao Luo, with her adult mind, starts to turn things around. During a chaotic first day, while other children are crying, Gao Luo confidently argues with her niece about eating snacks. When a calculus problem is presented as a task, Gao Luo, an Ivy League graduate in her previous life, effortlessly provides the correct answer, stunning everyone. She also charms advertisers with her confident presentation skills, securing opportunities for her niece.

As the show progresses, people notice the resemblance between Gao Luo and Gao Shule, leading to speculation, until Gao Shule clarifies that the little girl is actually her aunt.

During one segment involving swapped "parents," a tall, handsome man tries to interact with Gao Luo. She finds him vaguely familiar and then recognizes him as a distant relative who, as a child, had declared he would marry her when they grew up.