In the world of Remnant. There were humans and Faunus that treated each other as enemies but they have one thing in common. They only Fear of the ruthless human species called the Amazons. Amazons are mostly known for their ruthless killing and hunger for humans and Faunus. But what the humans and Faunus didn't know about the Amazons. The Amazons are coming

with the rider war is over, and the winner is Ren Akiyama. everything has becomes peaceful. no mirror monsters, no more mirror world. unfortunately, mirror world, advent decks and the mirror monsters just begin to invade planet remnants. Will remnants use the advent decks to unite and help the world? or is this just gonna be another rider war? (This story will be a mix, following RWBY and a bit of Kamen rider Ryuki storyline but also a new story that didn't follow those storylines) (RWBY is claimed by rooster teeth and Kamen rider Ryuki is claimed by Toei company)

Now that Tid was defeated by the Heisei Riders, but Sento and Ryuga were unknowingly transported to a place called Remnant where Hunters and Huntresses are heroes and fighting off monsters known as Grimm. They also met a certain red-head and blonde when they arrive in different locations. Now, let's see what adventure and events are in-store for these two Riders.... Disclaimer: I don't own Kamen Rider and RWBY, but SMASH Grimms. Both T.V. Shows and Anime were owned by Toei and Rooster Teeth.

After defeating the evil alien known as Evolt. Sento was taken to the new world only that he was transported to Paris instead of Japan. He then finds out that there are two heroes by the name of Ladybug and Chat Noir. Join him as Kamen Rider Build as he helps this two heroes to be the one. But little does Sento know he was not the only one transported to the new world in Paris