The ruler of the evil Phantom Empire, Queen Mirage, begins her invasion on Earth using an army of Choiarks and powerful monsters called Saiarks. All across the world, Pretty Cures are dispatched to fight against the Phantom Empire threat. Hime Shirayuki, a princess from the Blue Sky Kingdom, which was taken over by the Phantom Empire, joins the fight as a Pretty Cure named Cure Princess, but always finds herself running away scared. Given a Crystal of Love by the Spirit of Earth, Blue, and told to seek out a partner to fight alongside her, Hime goes to the city of Pikarigaoka and randomly throw the crystal in the air, deciding to partner up with whoever it lands upon. This person turns out to be Megumi Aino, a kind-hearted girl always looking to help others, who is recruited by Hime to fight by her side as Cure Lovely.
In a world separate from the humans is a place called Chou Shinkai. In this world lives super beings called Hikaribito. However, among such people are those who commit crimes. Such people are known as Kageribito. The ruler of Chou Shinkai is the Shinkai King. There are monsters in Chou Shinkai called Magii. When Magii appear in the human world, they can be seen by people with strong spiritual senses. Since ancient times, Magii have been called mononoke or youkai. Hikaribito Gou and Navi travel across Chou Shinkai in their ship, the Bunba, to deliver the Kageribito to the land of exile. But when the transport mission goes wrong, Gou must gather a team of five brave people before the 1000 soldiers arrive in 100 days.
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.
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.
The Panther Claw organization is driven by a relentless pursuit of wealth, using any means necessary to achieve their goals. However, their plans start to unravel thanks to the unexpected interference of a seemingly ordinary girl. This girl, who initially encounters Panther Claw by chance, turns out to be Kisaragi Honey, the ‘daughter’ of the brilliant cyberneticist Dr. Kisaragi Koshirou. Recognizing her value, Panther Claw’s four members race to capture Cutie Honey. Kisaragi Honey, also known as Cutie Honey, is not alone in her fight. She is joined by two allies, Saotome Miki (Sister Miki) and Kenmochi Yuki (Sister Yuki). Together, they work to thwart Panther Claw’s schemes and protect Honey from being exploited.