Maximum Perversum 60: Bis an die Grenzen der Lust (1998)

The tour bus drives off. No one has noticed that two girls from the tourist group are missing, who were visiting the castle. Now the two of them are standing in front of the old building, wondering what to do. Sure, a quick phone call will clear things up. Not so fast, girls — better get ready for a confusing and extraordinarily hot adventure…!