Masked Rider 555: Paradise Lost

Paradise Lost is considered an alternate ending to the series, in which Smart Brain and the Orphnochs have won the war. In the near Future, Smart Brain has accomplished its goal of world domination -- with 90% of Earth's population being Orphnochs while the human race is diminishing to near-extinction. Takumi Inui - a.k.a. Kamen Rider Faiz - was regarded as mankind's savior until he was presumed killed during an attack by Smart Brain's Riotroopers. Since then, his friend Mari Sonoda has formed (mydramalist.com)