What was the last thing you did? What stage are you at in the game?
At the end of the story journal, it says, “You can spend time with the girls,” so maybe you've finished the storyline that's currently available.
So that's the end of the story that's currently in the game. After receiving the underwear from Vanya, there's a message saying the story is over for now, but you probably just clicked past it / skipped this notification
The only thing left after win her panties is to view this in 3D in the player's room while interacting with the closet.