I'm sorry for not making that clear! When the purple meter is full, you can open the camera, and if the succubus is near the player, it will put her into a hypnotized state, allowing you to take photos and increase the domination gauge. Once the domination gauge is filled, it will trigger a cutscene where she loses a piece of clothing. After doing this three times, you win the game and unlock her in the gallery mode.
I’ll also be working on fixing the issue with the boxes not spawning correctly. Thanks for your patience and for bringing this to my attention! ❤