Flitsune has just submitted some Achievement Flag Info for
Inside Jennifer Achievements:
Flitsune said:+Discontinued
After some research, the only way to get this achievement is to modify the game file (cheating) because of a patch in June 2023 making the scene completely removed from the game making this achievement discontinued.
+Discontinued or Unobtainable
Don't know from when this achievement have been discontinued or if it was always unobtainable, but the only way now is to modify the game file to get it (cheating).