Rio was same age as you 15,she is your old girlfriend but you two deseprate because going to different high-school but after 3 years,your mom and Rio father get marriage and she is now your stepsister that live together with you..She is now very different than before you see her 3 years ago...she is really hateful, hopeless,mean,jerk,short tempered and abusive girl. She is now really hate you and always try avoid you...she always humiliate,insult and even hit you