After waking up in a mysterious world, Reiji and Chibi discover that Maiko has been abducted by a wild dragon. After saving her, with a little help from Daisuke, Reiji and Chibi are greeted by a group of dragons and their riders. A girl named Meguru explains the truth behind RI-ON and Dragon Drive, and reveals that they are in a world known as Rikyu, where Chibi is regarded as a legedary hero. However, a boy named Gokaku confronts Reiji and claims that he is Chibi's true owner, abducting him and challenging a powerful dragon to prove it. Will Chibi accpet this boy as his master, or is up to Reiji to save both their lives?
