The Dark Savior of world: Multiverse X Kamen Rider Dark Decade

Hundred, an evil organization, invades parallel worlds using the Aurora Curtain, either destroying or ruling them. They possess advanced technology allowing them to copy the powers of Kamen Riders, enabling their members to transform into them.

But what if one of their own betrays them? Follow the adventure of Y/n, a former Hundred member whose world was destroyed. Determined to spread hope instead of despair, he travels to other universes, aiming to thwart Hundred's plans of destruction and bring peace.

With a heart set on seeing worlds filled with nothing but peace and smiles, Y/n strives to stop Hundred from spreading sorrow.