Are you talking about the black screens? If so, that's intentional. There's only one 18+ CG that you can get during Day 1. The remaining scenes don't have any.
By default, the 18+ scenes are locked behind sleeping with Ren in Day 1. If you don't sleep with him, you won't be able to view the remaining 18+ scenes. But if you choose the "Show all 18+ scenes" option, you'll be able to view all the 18+ scenes without needing to sleep with Ren in Day 1.
I hope this makes sense! ^^