Legend recounts that when the world collapsed, master horologist Y fashioned a new planet from gears and cogs. Naoto Miura is a young dreamer who longs to become the finest clockmaker. Yet, despite his extraordinary gift—an acute hearing that instantly deciphers mechanical rhythms from sound alone—he has barely advanced. Everything shifts when a sarcophagus descends from the heavens into his flat, unveiling RyuZU, a female automaton crafted by Y himself. Word of RyuZU's arrival draws Marie Bell Breguet, heir to a storied lineage of clockmakers, and her cybernetic guard Vainney Halter into Naoto's orbit. When she and Naoto are thrust into a fierce clash for survival, they uncover a chilling reality: the mechanical world humanity has inhabited for over a thousand years is fracturing—a truth that many will murder to keep hidden. Their quest becomes against time, as guardians awaken to protect the balance.
