The Mask Room is a room to the left of the Basement. It can only be accessed in Forgotten Hourglass playthroughs. It is likely that this room belongs to the Masked Lady, as there are several white cloaks of hers stored in here.
- Selecting the wall with pictures pasted on it opens the list of unlocked Moments.
- Selecting the bookcase unlocks Moment 12 and 13.
- The drawing of Hans to the left of the Moments wall is similar to the artwork of Amber Wishes (Deemo edit).
- The artwork of Suspenseful Third Day when Full Combo is acquired hints at the existence of this room.
- With 100% Staircase Height, the Little Girl and Masked Lady can be seen directly conversing with each other here.