Season 1

After being defeated by the Horror Messiah, Jinga, a fallen Makai Knight reincarnates into the Mikage family with no memories of his past self. Once an adult, he is forced to kill his father, a Makai Knight who also turned into darkness, and now Jinga must fight a Horror who develops affection towards the children of its host, and must confront his tragic past again.

Now partnered with Makai Priest Fusa, Jinga must deal with a Horror that possessed a girl who is being tormented by her classmates, but after slaying it, something that they've never seen before startles them.

Jinga and Fusa take Jinga's little brother Toma to a Horror hunt as part of his training. However, when facing a Horror that uses one's darkest memories against them, Toma becomes its host, and Jinga must rely on his new power to bring him back.

Jinga's next enemy is a wrestler turned Horror after his family was killed by a thug, and since then only attacks criminals.

The Watchdogs send Makai Knights Rozan and his disciple Shijo to investigate Jinga's abilities and confirm if he is a threat or not.

Fusa goes on a solo mission to investigate Horror victims related to a hostess club, unaware of Jinga's sudden and ominous change.

Rozan investigate Shijo's disappearance while Jinga is confronted by his other self, who attempts to draw him to darkness.

Fearing for Toma's safety, Jinga decides to take him back to Makai practitioners' village to continue his training with the other Makai Knight apprentices, but determined to prove that he is strong enough to continue traveling with his brother, Toma challenges Subaru, the strongest of the apprentices there, for a match.

Ugai, a Makai Priest capable to locate Horrors faster than the Watchdogs, asks for Jinga's help to rescue as many humans as possible. Their new partnership is a success, but Fusa is more and more wary of Jinga's behavior.

Certain that he is doing the right thing, Jinga keeps defying the Watchdogs until he discovers that one of the people he turned back to human returned to his evil ways.

Fusa has another encounter with the other Jinga, much to her grief, while the Watchdogs send Rosan to arrest Jinga for his transgressions.

Jinga resists and starts killing his pursuers to escape, until his other self appears to confront him.

The Horror Jinga reveals the truth behind Jinga's power and puts the final touches in his master plan.