Eiichiro Suzuki

Strange things lurk in dreams. For Mukoda Tetsurou and the doctors tending to him, things have begun to get stranger as Mukoda begins having longer and longer dreams every night. Can one dream infinity in the span of a night? (imdb)

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)

The story revolves around the nine parallel universes of the previous Heisei Kamen Riders merging into one, something that would destroy all the worlds. To prevent this, Tsukasa Kadoya transforms into Kamen Rider Decade and is told that to save his own world he must travel with Natsumi and her grandfather to the other Kamen Riders' Worlds called A.R. Worlds (Another Rider's World or Alternate Reality World) and defeat the other Kamen Riders. (wikipedia)