Kamen Rider Ryuki x High school dxd (the dark dragon awakes)

There are two worlds, our world and the mirror world. Young Tyler, Leader of Neo Night Raid, along with him are his comrades but as they know what they're living in, It Is a world where a devil roam free on human ground and enslaving the dead, maybe human or some species, to be like them. Now Tyler and his friend will change this world and show the supernatural or not to underestimate not human and see that the law of human slave and live free and have true freedom. Mirror Monsters will reassemble humans and other riders, to protect this world instead of fighting eachother for it, Tyler and his friend will work together to protect the supernatural and defeat the rogue devil, from destroying the world before it destroy's the whole planet and live happily with a smile

THOSE WHO DON'T FIGHT WILL NOT SURVIVE