After Wearing the Book, I Defeated the Crazy Prince.

[Fake travel book + double strength + strong men and stronger women + marriage first, love later + male protagonist reborn in the third life + female protagonist with full force value] After passing through the book, I became the cannon fodder princess who was destined to die early. The system said that the male protagonist was a crazy person and had killed the original female protagonist three times. And my mission is to protect the original heroine. Me: It's not a big problem, I only need to kill him once. On the wedding night, he wanted to cause trouble for the heroine. I kicked him back. He wanted to draw his sword. I slapped him away. Male protagonist:......