Well I just tried GranBlue Fantasy and yeah Kamihime is 1:1 copy. GBF has much more budget it seems, I mean, you can hear Rie Kugimiya nd Miyuki Sawashiro in the first 5 minutes. Only reason you get more free stuff in GBF is Nutaku, they really damn stingy about anything, I play FKG on DMM and started Kamihime, they have much more login bonuses and free stuff.