Gorgeous VN that is a delight to play. The mystery is so gripping that I had to finish it in one sitting of about an hour without any breaks.
The art is beautiful throughout for the CGs, BGs and sprites. The witches are enchantingly fashionable with unique designs. As many have praised before: the GUI is very pretty and the endings unlock screen is very nicely done with how a pendant is incorporated in the design.
The moody audio is befitting: musical tracks perfect for the setting (such as the feminine opera soundbit) and characters are emphasised by their partial voice acting for pivotal moments.
It's really fun to explore the rooms and objects in the house (good use of camera panning for a sense of first-person movement), which gives this VN pleasant adventure game vibes. That it truly feels as if you're sneaking around makes for great suspense. You can read diary snippets to find more about the character relationships and intriguing world lore, such that you piece information together alongside the amnesiac MC.