Kagetsu, a pivotal agent from the magic-wielding Guardian World, serves as a "neutralizer" capable of temporarily stripping others of their magical abilities. Forced to summon daemons for combat due to his own limited offensive power, this skill becomes indispensable in his pursuit of the Throne of Yord—an artifact crucial to preserving his realm’s equilibrium. His mission turns personal when he steals the Throne to free his sister Sara, whose consciousness is fused with the artifact’s sentient, manipulative core.

This act ignites a clash with Tiara, a former lover and fellow Guardian World operative tasked with reclaiming the Throne. Tensions escalate with Graham, Tiara’s first summoned partner, whose hostility toward Kagetsu stems from perceived threats to Tiara’s safety. Their rivalry peaks when Kagetsu neutralizes Graham during a skirmish, severing the magic that anchors him to the physical world.

Kagetsu’s desperate bid to save Sara casts him in a morally gray light, defying simple categorization as hero or villain. His alliance with Lena—Sara and Tiara’s childhood friend—adds layers of conflict as Lena wavers between loyalty to Sara and growing unease over Kagetsu’s methods. Flashbacks reveal Kagetsu and Tiara’s fractured romance, eroded by the demands of their duties, and his theft of the Thorne emerges as a last resort to challenge Tiara’s rigid adherence to protocol.

Despite initial antagonism, Kagetsu and Tiara unite to quell the Throne’s corruption, forging a fragile truce. His arc traces a shift from defiant outcast to a figure embracing sacrifice, underscored by themes of familial bonds and the costs of power. In the aftermath, he returns the Throne alongside Tiara and Lena, navigating a path that bridges duty with hard-woneredemption.