The new school year begins at Amanogawa High School, and Kengo Utahoshi is detecting strange energies around the school. And things get stranger when yankee-looking Gentaro Kisaragi transfers into the school and decides that he wants to be Kengo's friend.

Kengo reveals to Gentaro that he must turn off the Zodiarts Switch used by the person who activated it in order to truly defeat a Zodiarts. As Gentaro and Yuki search the campus for the owner of the Zodiarts Switch, she begins to tell Gentaro more about Kengo and how he came to have the Fourze Driver and the Astroswitches.

When the annual Queen Festival comes around, Gentaro decides if he wants to befriend Miu Kazashiro, he must convince Yuki to enter a talent contest that Miu wins every year and beat her.

Gentaro decides to help Miu retain her title as Queen and Fourze goes after the Chameleon Zodiarts to protect Miu.

While Miu intergrates herself with the group, JK finds himself being targeted by a Zodiarts and Gentaro finds a new Astroswitch difficult to use, the Elek Switch.

Gentaro finds out that JK was just using him for protection against the Zodiarts and has stolen the Elek Astroswitch but Gentaro is determined to show JK the power of frienship and help JK despite being tricked by the other.

Kengo, Yuuki, and Gentaro are forced to take supplementary lessons on a Sunday due to missing classes whilst defeating Zodiarts. Meanwhile, Shun grows angry with the Kamen Rider Club and Miu's involvement with them. JK and Miu try and hold down the fort whilst the others are in class.

Gentaro, Miu, JK, and Yuuki continue to track down the Hound Zodiarts, and Shun decides it's time to make his own choices about his friends and school activities.

Tomoko tells the group that the end of the world is coming- and that she will become the Luna Witch. When three witches and Tomoko start performing magic around the school the Kamen Rider Club must find out whether this is witchcraft or actually a Zodiarts.

Tomoko must decide whether to use a Zodiarts Switch to get her wish or help the others defeat the Zodiarts currently rampaging through the school.

Yuuki is targeted by a Zodiarts who is obsessed with her. Meanwhile, the locker which attaches the Rabbit Hatch to the school goes missing leaving Kengo trapped on the moon.

The Pyxis Zodiarts decides the only way to get revenge is to use his power to kill all the girls who rejected him, including Miu, by driving a bus with them all inside off of a bridge. Meanwhile, Kengo is still trapped in the rabbit Hatch.

Gentaro and the others decide to bring back those students who were Zodiarts to the school, starting with Toshiya Miura.

To save Miura from using a Zodiarts Switch again Gentaro must go up against one of the Horoscopes, Scorpian, a commander Zodiarts.

Yuuki is invited to join the Glee Club for a performance for the Kindergarten Class, however, her singing disrupts a fellow student in possession of a Zodiarts Switch.

The Perseus Zodiarts seems to be too powerful for Fourze to stop on his own, however, the appearance of the new Kamen Rider Meteor may change this battles ending...

After Kengo reaches a dead end in finding out the identity of the mysterious new Rider, Sonoda-sensei introduces new transfer student, Ryuusei Sakuta.

Ryuusei tries to gain membership to the Kamen Rider Club to further his own agenda but whilst most of the Club is fine with a new member, Gentaro is against Ryuusei joining...

Kengo has a fight with Gentaro due to his decision to let Ryusei for adjusting the Astroswitch (the reason of fight actually because trying to complete the imperfect Magnets Switch)

Gentaro and Kengo must find a way to overcome their rift before a powerful Zodiarts defeats both Fourze and Meteor.

With Sonoda still absent from the school Gentaro's class gets a new homeroom teacher who is far more interested in Kickboxing than teaching.

Gentaro and the others are convinced that their new Homeroom Teacher is the Zodiarts that is currently rampaging, however, Ryusei figures out that the culprit is not their teacher.

Gentaro and friends hear about a new hero from their classmate Norio Eguchi, who identifies the hero as Cygnus and also happens to be a member of the Ugly Duckling Society, a fan club dedicated to Cygnus. However, this new hero is not as good as he seems...

The gang must race to find out who the Switcher is- before the new 'hero' wipes out Fourze and Meteor to become the sole hero in the city...

Miu and Shun are due to graduate- however, it seems like it might not be smooth sailing as previous Zodiarts return.