Hi Yotsubro! The game was a joy to play, but there's some issues I found.
After beating the either boss, replaying and facing the other boss does not unlock the scene in the Story Playback. Also, playing the moon again will have only one boss fight before being taken back the overworld.
As a side note, I beaten Hecatia and then Toyohime, despite that I unlocked the 'Lactose Intolerant' scene. My first playthrough I first beaten Toyohime, so maybe the clear game didn't work properly? I can't say for sure.
Other than that, great game!