I took some inspiration from kekkeki sensen but the overall world is different. Hell Salem is taken from there but the combat functions differs greatly and it's not just New York that's been effected. The convergence event just kicked off things. Im just hesitant to rename salem it because I'm not sure how much interest will be generated. Likewise white rose is not libra they're more civilian and have more in common with say the church from blue exorcist but even then the Paladin's here are just prominent combat operatives. 

As ot stands people dont use blood as weapons and the government has a more active role in hunting down both rogue humans and monsters like kaiju also show up. The long list of terms should make it clear enough that its mixing a lot together from different types of things that make it original. People would call it homebrew if it were dnd.

Edit: I'd like to further explain this now that I'm actually awake. There are also a number of things that are present in Kekkei Sensen, or other anime that aren't in here. For example there isn't direct influence from any number of gods that may or may not exist in this roleplay. Demons are actual demons not monsters. White (or was it black) from the anime was similar in that he had another entity in him but these ones are more intrusive and he wasn't able to conjure actual weapons. Black Born are more similar to bleach visored. But masks aren't a commonality upon the already few people who become them. The one that will appear in this rp for the most part as a part of white rose is a boy who conjures a black sword, and a mask that acts as a conduit for his power. The more he uses it the more intrusive it becomes on his self control. The paladins, and church are officially sponsoring us we aren't police. We're actual vigilantes operating out of some church legitimacy but we'd be active without their help. There's a number of things that differ this from any one series.