Talk:Solutions/@comment-117.7.202.175-20170402100526/@comment-171.234.233.191-20170605080358

(The same commenter)

That is the room which you have to use the Study Key to open.=))

And I had gone through it already! I forgot to take the Piano Dream Key so I had to replay it (Thank God that I've saved it). At least the problem is solved!=))

Maybe it's a little bit to late but thank you for your respond! <3