Why I Can't Complete Peng Sha in the Book

When I woke up, I found that the whole world was different. I dressed as a minor and suddenly became many years younger. It is said that I also have a fiancé with a little carrot head. And with the idea of ​​taking care of things as they come, before I started living, I discovered that I had been transported into a novel I had read before, and my original body , not the protagonist's harem, nor the protagonist's beauty, but the protagonist's cannon-fodder brother's cannon-fodder fiancée. Except for the short story where she was a child, there are only a small part who died miserably. Thinking about it this way, there are too few plots that are related to it. At least I just give it an identity that is not related to it...