It's about life in general... could be your life as a main character even before you born. A life where u let yourself to be seduced in order to become seductive. A life full of choices, a life where you have to choose between be a moral and decent or to give in to temptation, feelings and a man's carnal desires. In the first part "Prologue" some events occur before you (as a main character) were born and that is the way to found out about you and all events happened.
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