Oh no!
There should be a walkthrough included in the game labeled walkthrough.txt.
After achieving ending 8, restart the game and fast-forward to the part where Camille is standing outside of Osgoode's door. Continue to knock and wait until Osgoode answers the door himself. DO NOT GO IN IF THE DOOR OPENS BY ITSELF WITHOUT OSGOODE PRESENT.
It takes a while, but after 7-10 knocks, Osgoode should show up to answer the door. Keep playing the game until you reach ending 9.