Hiro, the half-human, half-demon heir of Demon Lord Janus, rules the fractured realm of Neverland after her father’s assassination by human rebels wielding Tenmaken, a blade capable of slaying gods. Thrust into leadership during a continent-wide war ignited by Janus’ death, she battles her vengeful hatred for humanity while relying on allies like Sato, her steadfast human bodyguard, whose loyalty challenges her prejudices.

Her journey forces a reckoning with Jadou, her disowned brother—a demon raised by humans who orchestrated their father’s downfall. Their clash culminates in a defining choice: break the cycle of vengeance or perpetuate it, testing Hiro’s capacity for trust. As alliances shift, she partners with warriors from Muromachi, including the strategist Simba, to thwart Mugen, the Underworld God encroaching on Neverland.

Though Hiro brokers fragile peace, humanity’s recurring prejudices reignite wars years later. Her legacy evolves into that of an eternal wanderer, aiding justice-seekers while balancing her dual identity and the weight of Janus’ legacy. Her story weaves leadership’s burdens, fractured kinship, and the relentless echo of history’s conflicts.