This is a very good game! I love playing jrpg horror games and this hit the spot! I'm near the end (missing only the water marble to open the Watchtower door) but I am stuck in 2 places T-T
1) How do I obtain the piano keys? I had the E key and inserted it, but after an hour of searching the mansion I got back to the piano and the E key was missing, it's not even in my inventory (also I'm terrible at solving piano riddles) T-T
2) I think there's a bug regarding one bookcase in F2, I found a hidden item with the stimulant but I'm unable to claim it. (I've posted a picture of the spot)
Could you perhaps provide me some assistance? I'm curious to finish the game and see the ending :D