Make sure that the appropriate scenes are available as "HiddenCam" in the girlpack. You won't get anything else to watch.
Go to the mall and click to "East Mall"
On East Mall click on "COMPUTER / BOOKS"
Buy a smartphone and some cams
Wait in home to see this in the InfoBar
Go to the University on evening and learn
After complete learn you can install the cams at girlfriends home or buddys home or in your mansion
After install you see this symbol on top left side
In mansion at Studyroom you can manage the cams at girlfriend and/or at buddy
Click on Watch will open a greater window
If you install cams at buddy and girlfriend, you can see at buddys home what you girlfriend are doing or at girlfriends home, what the buddy doing