New Game With Checkpoints
Saves from previous versions shouldn't work in this update, but you can just start a new game an keep whatever you want of content an character intimacy.

Step-sis Content
Invite your stepsis to watch movie with you after 22:00. You can chat, just watch, or watch popcorn during the movie.
Things can happen when popcorn is finished.
For that to be available, make sure you buy Corn and leave it on the fridge
No popcorn available? Don't worry, you can just skip time until a next day comes with the new button, that you can skip any hour you want! Store items refresh every day.

After the movie, you can sleep with your step-sis and have very intimate moments with her. This content is repeatable, and from the second time you sleep with her, you have 3 additional options.