a lot of writing yes!!
but i have to say ur story line is superb well planned, a lot of confusion and twisted dimentions perfect for a Manga. and what sounds like high obtained action.
the only fault i have with it is that there are animals playing the part of humans,different i know and very individual but when i saw the hedgehog bit it kinda reminded me of Sonic hedgehog and i don't really like sonic because it's too child like and doesn't really hold my interest.
but well done apart from that i think it's a real winner.
i have to say thast a wicked idea 4 a manga really action packed i can imagine. keep it up dude it's really good.