Kohei Kumai

When a powerful new foe known as the Legendorga arises in 2008, Wataru investigates the mystery behind the crisis, which brings him in contact with a man Nago once knew, Shiramine Takato, whose 3WA also possess their own Rider System. When Shiramine explains how everything began in 1986, Wataru uses Castle Doran’s Time Door to travel back in time, leading him to meet his father face-to-face at last. But has Wataru managed to change the future, or will the Legendorga still rise and enslave humanity?

On June 2, 2008, Toei announced on its various official websites that there would be a series of short five-minute internet movies that are spin-offs of Kamen Rider Kiva: King of the Demonic Castle. The featurettes are called Kamen Rider Backwards-Kiva: Queen of the Demonic Castle. In these shorts, Otoya and Yuri are brought into the present by Castle Doran when the mysterious Queen of the Legendorga is about to be revived. The shorts themselves are all zany misadventures of everyone in the Kiva cast.

Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.

22 years after the disappearance of his father, Wataru Kurenai lives in an infamous "haunted house" where he is destined as Kamen Rider Kiva to fight Fangires, a species of life force-draining vampires who can assume stained glass-like monster body that his father fought years ago before his disappearance. The story is split between Wataru in the present (2008–09) and his father Otoya in the past (1986–87), slowly revealing the link between the Fangire race and Kiva.

On June 2, 2008, Toei announced on its various official websites that there would be a series of short five-minute internet movies that are spin-offs of Kamen Rider Kiva: King of the Demonic Castle. The featurettes are called Kamen Rider Backwards-Kiva: Queen of the Demonic Castle. In these shorts, Otoya and Yuri are brought into the present by Castle Doran when the mysterious Queen of the Legendorga is about to be revived. The shorts themselves are all zany misadventures of everyone in the Kiva cast.

Ren'ai Shinden is based on different types of forbidden love and consists of four different stories: Tsubasa no Kakera, Sayonara no Melody, Seifuku no Eve, and Unmei no Kodou.