The Pornstar Starlet is about a guy that used to watch much porn and work as a freelancer developer until he meets Kate, a friend of his friend. Should you build a relationship with Kate or should you go into the porn industry? It's up to you.
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