The "Desire Grand Prix" is a game to protect the peace of the city from the threat of the mysterious enemy "Jamato", whose origin and purpose are unknown. Each participant transforms into a Kamen Rider and competes to win the game by defeating enemies and saving people. The winner of the Desire Grand Prix will be rewarded with "the right to bring an ideal world to life" as a prize. In other words, only the true hero who wins the competition will be able to realize the world they have wished for.

When the Deadmans attack, the only one who can stand up to their Dia de los Muertos-themed assault is... the son of a bathhouse owner and the demon attached to him. Ikki Igarashi is Kamen Rider Revi. Vice is Kamen Rider Vice. With the power of the Vistamps, they are Revice! Together, they will defeat the Deadmans... but not without intervention from the government organization Fenix.

A young self-proclaimed comedian, Aruto Hiden, finds himself inheriting his late grandfather's technology company and the Zero-One Driver to becomes Kamen Rider Zero-One and becomes a hero to humanity.

10 years ago, the Pandora Box was discovered on the planet Mars and brought forth a catastrophe that would forever change the country of Japan. In the years following the Sky Wall Disaster, the rising of the Sky Wall divided the country into three warring territories: Touto (Eastern Capital), Hokuto (Northern Capital) and Seito (Western Capital), and created a series of unidentified monsters known as Smash that relentlessly attack the public. To combat this chaos, the Touto government requested the help of Sento Kiryu, a genius and prodigious physicist to help decipher the mysteries left behind by both the Pandora Box and the Smash. Alongside prison escapee Ryuga Banjo, who was wrongfully framed for a murder he did not commit, the duo embark on a journey as Kamen Riders to uncover the mysteries surrounding the Pandora Box, the Smash, and their own pasts. Their journey would not come easy as they face adversaries from Hokuto and Seito, whom they must ultimately confide in if they are to have any hope in stopping their mutual enemy, Evolto from destroying the planet that they hold dear.

Amanogawa High School has become the center of strange happenings, and things only get stranger when the bad boy styled transfer student Gentaro Kisaragi attempts to make friends in his own unique way, reuniting with childhood friend and self-professed space travel otaku Yuki Jojima, all while gaining the ire of loner Kengo Utahoshi. When the campus becomes overrun with monstrous constructs called Zodiarts, Kengo and Yuki attempt to use the strange devices they have found in the Rabbit Hatch lunar base that they access through a locker on an off-limits part of campus to fight them. However, Gentaro interferes in their plans, in part due to Kengo's body unable to handle the strains of battle, and uses the devices to transform into Fourze. 

Upon learning of other heroes called Kamen Riders, Gentaro creates the Kamen Rider Club whose membership includes Yuki, Kengo, the school's queen bee Miu Kazashiro, Miu's jock ex-boyfriend Shun Daimonji, garishly styled social butterfly JK and goth girl Tomoko Nozama. Later joined by Ryusei Sakuta, a transfer student who transforms into Kamen Rider Meteor, and their teacher Mr. Chuta Ohsugi, the Kamen Rider Club and Kamen Rider Fourze learn of the Horoscopes, an evolved group of Zodiarts who have been orchestrating events on the school grounds to build up their ranks. As the battle escalates, the Horoscopes sets their motions to their final phase of their master plan before Kengo discovers his true existence.

Eiji Hino is a traveling man who has no place to call home and a tragic past. When coin-based homunculi known as the Greeed awaken after their 800-year slumber to attack humans and feed off of their desires, the disembodied arm of the Greeed named Ankh gives Eiji a belt and three Medals to fight the other Greeed as Kamen Rider OOO. The mysterious Kougami Foundation approaches Eiji and begins assisting him in his fight against the Greeed, though their true motives are not clear. As Eiji fights the Greeed and their Yummy monsters, learning more of the Greeed and Ankh, he starts to find a purpose beyond his journey.