You're a daughter of your family, the Nara family. You're supposed to have a twin sister, but the doctor said that you take all the nutritions when you're in your mom's womb which means your twin sister are never born alive

Your parents and older brother are quite upset about this, they've prepared everything: matching clothes, 2 baby cribs, everything. It's not like they hate you or something.. they're just upset, until now. Because of that, your parents decided to adopted a baby girl who is 3 years younger than you. Her name is Aria and you're really happy to have her as your sister.. but your family starts to adore her much and forget about you. Why? Because she's prettier

..

It's Christmas now and you're super happy. Now, your family is sitting on the couch and they're giving present to each-other. You've prepared all the good presents for your family.. and after you gave them the presents, you immediately notice that you only get one single notebook