Petropolis was always busy at both day and night, but something extraordinary is coming. An amazing legend...The Legend of the Kamen Riders!
Kitty Katswell slept in her bed, snoozing away. When sand began pouring through the cracks of her room, forming four creatures called the Imagin. "This one's mine Sempai!" said the blue one, "Well? What are you waiting for?! Hurry up, we haven't got all night! Anyway, I'm bored to the teeth!" said the red one; "Yay!" said the purple one. Meanwhile, on board the Denliner, "Have you found those four?" asked Takeshi Hongo. "I have, in a place called Petropolis." said Eji Hono. "Set course for Petropolis, Teddy!" said Koutarou. The Denliner sped towards that time era, carrying all the Kamen Riders with it.
The next day, Dudley sat at his desk, "Where's Kitty? She's never late!" said Dudley, "My, my, teacher gives A for effort on that." Said familiar voice in the lift, Dudley looked at it, Kitty was standing in the lift. She smiled as she pushed a blue strand of hair behind her ear; she peered at Dudley from her glasses. "Wow! You ok, Kitty?" said Keswick, "Never better!" she said. Suddenly, there was a loud crash and the red Imagin emerged from the lab, "Ow! Ow! I'm ok! What are you all looking at?" he said. "My, did anyone tell you how handsome you are?" said the possessed Kitty, "Let's go Casanova! Before you get any funny ideas!" said the red one, pulling Kitty away. "Wait! We want to know your names" said the chief. "I'm Momotaros and that's Urataros." said the red Imagin. "Only, I'm the smart one!" said Momotaros, pulling Urataros back further.
Suddenly, the ground shook and the evil Dai Delzar appeared. "Can't talk! I have to fight this thing!" said Momotaros, he strapped a belt around his waist and held something the size of a matchbox. "Henshin!" he said sliding the object over the belt, "Sword Form." It said, suddenly the Imagin was changed; he has become Kamen Rider Den-O! "Ore Sanjou!" He slashed at the beast a couple of times before it was destroyed. "And that's called making an entrance!" said Momotaros, powering down. He walked over to Kitty and to Dudley's surprise, pulled Urataros from her. "What's your wish miss? I'll grant you anything!" asked Urataros, down on his knees. Kitty thought for a moment, "Hmm!" she said. Momotaros came forward, "Hey! Hey! If you make a wish with Turtle boy, you forge a contract with him!" Momotaros snapped, "A contract? Sounds fun! I wish to be the boss of T.U.F.F!" she said. "W...What? Don't make a Contract with him, what about me!" said Momotaros. Suddenly, the contract was made; Urataros and Kitty were connected until her wish was granted. Kitty was fond of her new Imagin friend, who told her about Denliner and the Imagin. "Yay for Momo-Chan!" said Ryutaros; "Do you want to see my strength?" said Kintaros, snapping his neck.
A few days later, Kitty took them to the beach. "So, what do you think?" she asked, "Wow! I should say hi to everyone!" said Ryutaros, "I don't think anyone can see you." She said. Ryutaros jumped into Kitty's body, extending her hair into one long purple and black streak of hair, "Mind I play with you? Can't hear ya!" she said in a different voice completely as she glanced at a group of cats from under her brown cap. Urataros and the others glanced at her as she break-danced across the sand. "What do ya think of my dancing?" she asked them, "She's a good dancer!" said one. Suddenly, a portal opened and Ryotarou fell out. "Ryotarou!" said Momotaros. The boy got his feet, shaking his head. He saw Kitty and froze, "Momo, what is that thing?" he asked.