Jutto Segu, a once-ordinary student at Fuuin High School, discovers he is the latest reincarnation of a fabled warrior destined to confront supernatural evils that threaten humanity. His life fractures when enigmatic figures—self-proclaimed reborn warriors from Japan’s feudal past—reveal his identity as the “Warrior of Light,” a linchpin in thwarting the Demon King’s return after centuries of imprisonment.

As the tenth and pivotal member of this ancient alliance, Jutto must unite the fractured group against Lord Shindigan, a cunning demon intent on reviving his master. Initially resisting his newfound role, he gradually navigates the collision between his teenage existence and the weight of his inherited legacy. Complex bonds with allies like Kotana Kifu, a warrior whose silent understanding mirrors his own resolve, and Futaba Amitaka, whose unspoken affection complicates their shared mission, shape his emotional journey.

Jutto’s evolution from hesitant recruit to resolute leader unfolds amid skirmishes with monstrous Kyouma in Tokyo’s shadowed corners and high-stakes battles to dismantle the Demon King’s resurrection rituals. Each confrontation tests his resolve, culminating in a cataclysmic showdown against apocalyptic forces. Rooted in a mythos of endless cycles between warriors and demons, his reincarnation binds past sacrifices to present duty. While his personal history beyond the conflict remains veiled, his choices underscore the cost of safeguarding humanity, anchoring the narrative in themes of fate, camaraderie, and sacrifice.