Taking place after the events of series, the Tarōs and Kohana go out of the DenLiner for a day to visit Ryotaro and Airi. However, they see the mysterious Ghost Train that has been mentioned in urban legends as Momotaros and gang are then attacked by two evil Imagin and Kamen Rider Yuuki Skull Form. During the fight, it is revealed to the Tarōs that Yuuki is none other than Ryotaro possessed by an evil Imagin.