After Transmigrating into a Book, I Became the Badass Female Lead

After transmigrating into the role of a cannon-fodder female character who dies as soon as she appears, she spends every day trying to push the prince away, unaware that he's only ever loved her.

At first, he can still keep his feelings in check: If she dies, so be it!

Later: Si Wanying, just say the word and I'll do whatever you want.

Why should I have to say anything? I can handle this myself. I've got a golden finger, I've got a System, and I've also got...

Si Wanying, are you trying to drive me to my grave?!

P.S. The male lead is pretty unlikeable at first (there's a reason! A reason! A reason!). The colder he acts early on, the harder he'll get his comeuppance later! Don't drop it too soon!!!