An end of content screen isn't an ending.
I defeated the boss by shooting it, what door can I now open? There's no new door in the outdoor area, the door with the red keypad is still closed and the door behind the panty office is still closed.
I defeated the boss by getting the red eyes, the door with the red keypad is still closed.
Could you just show a picture of the door and stop with the cryptic hints please.