Shiina and Akira are typical introverted teenagers in every way, save one--their bonding with cute extraterrestrial creatures, part of a growing number of alien entitiy émigrés, known as the fearsome Shadow Dragons, all of whom have linked with Earthling youths. Some have bonded with not-so-typical--and not so nice--kids. The appearance of the terrible Dragons in the skies over Japan has brought the Japan Self-Defense Force into conflict with the beasts, and a group of Dragon-controlling hard cases has decided to take the fight to the JSDF and teach them--and anyone else who gets in the way--a lethal lesson in the consequences of crossing swords with the Shadow Dragons!