Currently, the only "hidden" scene is locked behind A) having every card (bar the pink ones), and training heels, and then working on a place. But otherwise, it just having all the cards and following the main story
Viewing post in Orchard Stories: Bimbo Investigation comments
No, you are right. My sentence was misleading. The non-pink three appear only once. The pink ones appear each week. It would by fun if there was more diversity, though. Not only with the pink cards. Only three "main" body changes is a bit.... Well, let's say I hope in a later version there will be more of it.
But back to the main question. Is the "hidden" scene the one with the spilled drinks? Because I have only seen this one. And according to your information I have all the prerequisites.