Natsume Kiroemon, the 45th head of the Natsume clan, inherits the mystical 'Kiryuu no Mimi' after his father's passing, granting him wealth and charisma. Upon returning to Japan from his monastery training in Italy, he becomes entangled in a dangerous love affair with Kanako from the rival Mina clan. As tensions escalate and Kanako is captured by the malevolent Minas, Natsume unleashes the full power of the Kiryuu no Mimi to retaliate against his foes.