I Got Sent in My Favorite Novel to Save It?!

I am Nera mi Ponterise, the third child of the Marquess Ponterise Family. One of the founding families and sword of the Empire. We pride ourselves as a family of knights. All my life, I've trained to become a knight, living happily as the child of this great renowned family. But what I didn't know is that I was reincarnated in my favorite romance novel this whole time! I have been living with my favorite characters and I didn't even notice! How am I going to interact with them now that I know what's going to happen in their relationships? How is this happening to me? Is my life ever going to be the way I wanted it to be before I realized I was reincarnated? *** Notes: * 1 chapter update every day or every other day (Usually UTC+8) * Uses mild profanity, trigger warnings will be mentioned before the chapter if any.