Master Ozune Enno centuries ago bound the demon/guardian Zenki into his service to fight evil, particularly Karuma and Zenki was sealed away once the job was completed until needed again. Schoolgirl Chiaki Enno as the Enno descendant is able to break the seal on Zenki, but he is also bound in a child-sized form when not fighting evil because he is defiant so she must use the power of the bracelet which appears on her wrist to bring him to full fighting stature. The Seeds of Karuma cause people to turn into monsters embodying a vice which Zenki defeats so that he can eat the Seed. Set 3 adds demon/guardian Goki who boosts Zenki's power to the next level and usually provides a shield to protect the rest of the team of Chiaki, her Grandma Saki, Saki's brother Abbot Jukai, his assistant Kurabayashi and sometimes helping out hero Sohma Miki. When not fighting, Goki returns to his human form of a boy, Akira. **Included one-shot:** Volume 5: Kishin Douji Zenki (Pilot)
Raimon Ryuuta and Kuuko are sibling. Their parent is a treasure hunter, so since they were little they lives in a shrine with their parent's best friend who is an old man. Ryuuta and Kuuko are interested in anything strange, curious issues. Together they set up their business as a Fushigi Hunter, to solve cases of strange paranormal activity people asking them for help.
In 202X, robots have become essential partner for humans. One day, a silver security robot went out of control regardless of its emergency shutdown and people were in panic. The robot military unit "SARF" established in the metropolitan police begins their mission! (Source: Hero's web)
Ryuki Shiba, a boy who loves mecha. Guided by Alice, a small girl robot, he decides to board the giant robot "Demonic Dragon Barion" left behind by his father, who disappeared a year ago. A gigantic robot from the organization "Halloween", whose mission is to destroy the human race, attacks Tatsuki.
The prototype of the Kishin Douji Zenki manga is the very first installment of the Kishin Douji Zenki series. It consists of a single chapter, that has been officially released as a bonus chapter in Volume 5 of the final manga.
This side story focuses on the singer, Ranka. At lunch, a boy student possessed by a monster (called Vajra) attacks a girl student and sucks the animation in an empty place. Ranka feels it. She has the ability to feel the appearance of Vajra in Ranka for some reason.

