In the mystical town of Nara, high school student Chiaki Enno discovers her destiny is inextricably linked to an ancient, fierce battle against dark forces. As the descendant of the legendary Buddhist sorcerer Ozuno Enno, Chiaki inherits the sacred Vajra Bracelet, an artifact capable of sealing evil. Her peaceful life shatters when the Seed of Karma, physical manifestations of human greed and negative emotions, begin to transform ordinary people into grotesque, rampaging demons known as Karma Monsters. To combat this escalating supernatural threat, Chiaki must awaken Zenki, the ultimate guardian demon who was imprisoned inside a pillar for centuries due to his uncontrollable rage and destructive arrogance.Using the Vajra Bracelet, Chiaki summons Zenki, but initially, he appears as a small, chibi-like imp who resists her authority. Only when fueled by Chiaki's spiritual energy and absolute command does Zenki transform into his true, terrifyingly powerful adult form—a muscular, red-haired warrior wielding the Vajra Axe. Their dynamic is initially fraught with comedic friction and stubborn clashes of ego; Zenki despises taking orders from a teenage girl, while Chiaki struggles to manage his bloodthirsty impulses. However, as waves of increasingly powerful Karma Monsters attack, a deep bond of trust and mutual respect forged in fierce battle develops between them.The conflict intensifies with the arrival of Karma, a centuries-old sorceress who seeks to plunge the world into eternal darkness by harvesting human malice. Karma targets Chiaki, attempting to shatter her spirit and steal the Vajra Bracelet. Alongside enigmatic allies like the monk Goki and the reformed villain-turned-rival Ruka, Chiaki and Zenki face grueling trials that test their emotional and physical limits. Zenki must confront his own
traumatic past and the very nature of his demonic existence, choosing whether to remain a weapon of destruction or a protector of humanity.The narrative hurtles toward an apocalyptic climax as Karma unleashes her ultimate form, threatening to consume both the mortal and spiritual realms. Chiaki and Zenki must push past the brink of exhaustion, combining their ultimate spiritual and physical might in a cataclysmic final showdown. By channeling their unified wills, they execute a devastating final strike that obliterates Karma and purifies the lingering Seeds of Karma. With the crisis averted and the dark forces vanquished, peace returns to Nara. Zenki and Chiaki part ways with a newfound
understanding, cementing a legendary partnership that saved the world from the depths of human despair.