Here's a better trophy guide that doesn't require watching a video.
- Clear the game and watch every scene in the flowchart. This will give you all the trophies except three. You may have to replay that one choice with five keys associated with it in route 2 to collect some of the non-essential ones.
- Remaining trophy #1 and 2: Make sure revelation mode is turned on, then go back to the second to last and last choices in the third route. There should be new options available at each of these. The scenes these lead to will unlock two of the final three trophies.
- Remaining trophy #3: Once all of the above is done, go into the Album menu from the title screen. All of the numbered bad endings will be listed, which will take you to their corresponding hint corners. The very last one (its #27 I think) isn't on the flowchart, it's an easter egg hint corner that unlocks after you get every other ending. Read through it and the trophy should pop.
