When you attack an enemy, you get a message box that announces your attack. You can dismiss it with A. You can then combo an enemy by tapping A to the heartbeat of said enemy. I've noticed that the ...
In Chapter 2 (Playing as the Thief character), in the Osohe Castle, there are two doors like this, one in the basement, and one on the upper floor (past Mr. Passion). Upon interaction with the "door" ...