ok apparently BESM is the winner so let me answer some questions:
What kind of BESM game?
This will be a rather different one, preventing the final Extinction of the human race. Each decision will weight heavily on the world itself.
Setting?
I am seeing this as a rather futuristic setting. Japan most likely.
Theme?
Fantasy, Apocaliptic , Horror
Time-period?
the time period will be 4030, yes over two thousand years in he future.
Some Anime Intro that I have inspired from:
https://www.youtube.com/watch?v=nfjH8gXqPvI
https://www.youtube.com/watch?v=JGsAZCr-jwY