Occultus is a sex game about vampires, cults, and the debauched lifestyles of the wealthy. The game takes place in Moroburg, a small town with occult themes. You meet your aunt, and she teaches you about the dark underbelly of the city you live in. It's a world that you never knew existed and up until now would've been fearful of even getting near. Your aunt, however, is a woman that has always embraced the darkness, and she's more than happy to lead you down an unsavory path.