Do you have the scene after the body switch? There was a scene with Videl in the shower after giving her the picture but before buying the glasses. I think you might've missed it and I don't know if there is any way of going back to watch it. The scene was Videl giving a blowjob to the body-switched Pan.
I honestly don't remember. I played the game till I didn't see anything else to do, so I installed the prequel, and it installed itself on top of this one. So I can't play this one while I have that one. And I'm waiting for the update before installing it again. So yeah... You might stumble upon it unknowingly, but I haven't got a clue.
Also, there's a problem with both games, which is that after unlocking a bunch of scenes, saving and closing the game, when you came back, all the previous scenes that you unlocked will be locked again, even after loading your savefile. So if you save and close the game, when you come back, the old scenes that you have already unlocked before, and cannot access again, are now locked forever, unless you start a new game. And even if you do, this can still happen to you again. So yeah. A bit of a problem there.