Kara No Kyoukai CYOA: The Garden of Sinners

From the introduction: Welcome to Kara No Kyoukai a world in the Nasuverse. It's the mid to late 90's and the surface the world looks much like our own. However just beneath the surface the world is much darker. The paranormal exists though it grows rarer each day with the prevalence of technology. Still you will be sharing the world with amoral magus, Evil spirits, Vampires and several other sort of creatures commonly though only to be myth.