Shock! the Female Supporting Character in the Sadistic Novel Is Actually the Real Heroine!

[The little princess who is favored by the group + the evil emperor + wearing a book + coaxing] Is there anything wrong with dressing up as the vicious first wife of the male protagonist of a sadistic ancient novel? Which track is this coming from? Adhering to the concept that if you don't do it, you won't die, eat and drink well, and work hard to bring the male and female protagonists together and eventually get married. But who can tell her what the male protagonist is looking at? What about the heroine? Isn't it a piece of abuse? Why are you so beloved? And who is going to tell her? The emperor who is famous for his coolness is actually stuffed with black sesame seeds? Help...