You plan to kidnap a schoolgirl. When you kidnap her, you have to find a way to be undetected. police are everywhere. You want her to fall in love with you, or to become your slave, or to be caught by the police. The choice is yours.
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