Hi, if you are here I assume is because you have also tried to take a screenshot of any of the scenes in the game by hidding the HUD and the pressing F12 but failling misserably and being frustrated that the screenshot is taken only after you re-enable the HUD, but fear no more as the method to solve this is simple enough if a little tricky.

Just do the following:

1. Press F12.
2. Press Windows key.
3. Click on the Kara no Shoujo icon on the task bar (the one with the Black Egg).
4. Enjoy that satisfying screeshot sound :)

I hope this was useful in any way, cya.