After failing to get accepted to any college, you stayed behind for an extra year in order to bring up your grades. Your work paid off and you got accepted to the college of you dreams, away from this broken town and constant annoyances. However, before you get to leave for college, you are met with a series of events that may force you to become an "adult" earlier than you'd like.
In order for you to be able to install this game, you need to enable (allow) installation of applications from unknown sources (Unknown sources) in the phone settings. Usually this item is in the Security section