I remember years ago on gurochan, probably 2010 at the latest, seeing a hentai manga where a stage magician girl was going through all sorts of perils, including almost getting sliced in half by a "buzzsaw", but the twist of the manga was that, unknown to her, she was never in any real danger. It was all a training exercise/test to see if she has what it takes to be a stage magician/get over her stage fright, and in the end she performs on stage. Would anyone here happen to know what that was?