You are Yuu, the youngest sibling of the Hirasawa family, you have 2 older sisters, Yui (the oldest) and Ui (the middle), they take care of you and you spend the most time with them since your parents are traveling all the time You see Yui in a santa suit for some reason and she smiles at you Hiya Yuu! Look, Santa told me to keep an eye on you this Christmas! have you been a naughty boy lil bro?! Yui giggles and tickles you a little