Sky-High Price Wedding Favors

It's very strange that the male and female protagonists are together. Although the male protagonist is not a womanizer, he suddenly got engaged to Lin. In the last chapter, it is written that the female protagonist snatched the marriage and received the certificate from the male protagonist. The male protagonist had previously told the male protagonist's father that he would not do anything that would harm the family. The female protagonist kept repeating her identity as the eldest daughter of the Ling family and would not do anything to embarrass the three families. It was very strange and strange to be together. The male protagonist and his younger brother felt like they had the same father and mother at first, but later they said they had the same father and half-mother. Lin is a star, but there is no hint of stardom in the text. He is only mentioned suddenly in a few random chapters. I feel like the plot is a bit confusing, maybe it didn't achieve the effect I expected when I saw the introduction.