Tadahiro Amatsu stands as a pivotal figure shaped by hereditary gifts and emotional ties. His heterochromatic eyes mark a supernatural legacy: the left grants sight into the spirit realm, a lineage-born ability attracting demons drawn to exploit this bridge between worlds. Childhood forged a deep bond with his cousin Yuzu Hieda, their shared romantic feelings kindled by a vow made at their family shrine.

Now a high school student under the guardianship of the Hieda family—shrine maidens upholding spiritual equilibrium—his presence triggers the creation of the Miko Council, priestesses dedicated to safeguarding him from supernatural threats. Though avoiding direct conflict, his existence fuels escalating tensions. His relationship with Yuzu navigates social taboos and relentless assaults by antagonists like Michimune Ayatachi, a sorcerer bound to a dark deity.

Maintaining a reactive stance, Tadahiro anchors the narrative’s conflicts, his influence emerging subtly in critical junctures. The final confrontation reveals his impact through symbolic acts and emotional bonds, particularly with Yuzu, resolving threats by reaffirming their shared history. His development hinges on the interplay between vulnerability as a target and his role in sustaining allies’ resolve.

The narrative periodically delves into his internal strife—the gnawing sense of powerlessness and the weight his existence imposes on others—contrasted against steadfast loyalty to Yuzu. Climactic resolutions underscore their enduring commitment, intertwining personal sacrifice with the preservation of bonds that define their intertwined fates.