The World of Gaim (鎧武の世界 Gaimu no Sekai) is the version of reality where Kamen Rider Gaim takes place. The backdrop used to arrive in this world shows a city devoted to colorful plants. Unlike most worlds, it is Natsumi Hikari who serves the special purpose as opposed to Tsukasa Kadoya, her role being to transform into an Armored Rider. Kamen Rider Decade: World of OOO This world's setting appears to match up with the timeframe of the TV series' middle stage as Takatora Kureshima plans the equivalent of Project Ark in addition to the Scalar System installed into Yggdrasill Tower.