Go to the Astronomy Lobby during the night to start Bella's quests, then after the ritual you'll have access to the Black Hall and Narcissa
I found one of the special items the money but where is the rest?
The first one is at the library main hall, on the left side there is a clickable book, click it 10 times and you get a pantie.
The secons is in the Black Greenhouse, click on the ..tentacle.. plant daytime and you get a pantie after a short scene ^^
Thanks this vn is cool btw
