There is a heroine who lives like a supporting actress.
Some people have traveled through books, some have been reborn, some have changed their humanity, there is still a system, the world is actually a book, oh, what does this have to do with my Wan'er? I'm just an ordinary sad person.
Heroine: I have to be a supporting female character in a weird world, a female supporting role and a female supporting role. I am not worthy of it. I have disturbed you all. Sorry.
Concept: There are no supporting roles in life, everyone is his own protagonist.