And we were never going to use the bible black setting straight out, just the premise.
And I'd say we had enough interested parties for two games.
As for bible black and rapture academy, the main conflicts are the world was MOSTLY normal, although there were plenty of magic users besides the people who had the black bible. The black bible's magic was just supremely powerful compared to them. Also, now that I think about it, "mad science" was not completely inappropriate to the setting, coming in the form of incredibly effective lust drugs.
No futa virus(Although bible black had other futas throughout the series besides the original teacher, magic got around), no furries, no tentacle beasts or shadow world, no diabolical sex robots or vat/womb grown monsters made by mad scientists, everyone had pure human ancestry, and magic available to those without the black bible was mostly about wards and fighting. There were however a shit load of demons, some of which had tentacles.