One thing that you have to note is that, unless you have at least a basic idea of the overall story of the Showa-Era Kamen Riders, then you might be pretty lost for a bit. The story is sort of a really amazingly badass retelling of the movie "Birth of the 10th! Kamen Riders All Together" in which Kamen Ride ZX was introduced. This darker interpretation is very very cool, the art is absolutely fantastic, and the story is insteresting as hell. The arc about Kamen Rider Super-1 even caused the shedding of some Manly Tears. If you want an action filled story about heroes fighting for justice gono further!

and remember

"Even if there is no god or buddha, there is Kamen Rider."