Because the manga was in production by the time the TV series began broadcasting, the manga and anime have several significant plot differences. While the manga covers 107 chapters, the anime was condensed into 13 episodes and director Mamoru Kanbe said that he intended to feature much more of the original story. The anime only follows events roughly up to about halfway through the manga, and it has its own self-contained ending. As a result, several of the characters' pasts and details of the Diclonius are not featured in the anime. In 2005, a special original video animation (OVA), written to occur between the tenth and eleventh episodes of the anime, was released.