Bring here your old ideas~
First person.
The female n-girl Han Chuchu didn't know that she was a character in the book, nor did she know that her only role was to clear up misunderstandings between the male and female protagonists.
She cycled through her own three days.
Until one day she woke up and found that she had replaced the identities of other supporting characters.
It turns out that in the world of romance novels, characters who cannot advance the protagonist's emotional line will be killed!
This is a battle royale belonging to the characters of the novel!
Intention: Concrete creation theory