Years after the defeat of Naraku, feudal Japan enjoys a fragile peace. Sesshomaru’s twin half-demon daughters, Towa and Setsuna, are separated during a forest fire. Towa is accidentally sucked through a magical time tunnel into the modern era, where she is adopted and raised by Kagome Higurashi’s brother, Sota. Meanwhile, Setsuna remains behind, raised as a fierce demon slayer under the stern guidance of Kohaku, ultimately losing her memories and ability to sleep due to a haunting dream butterfly.Ten years later, the modern portal reopens. Setsuna, alongside Moroha—the boisterous bounty hunter daughter of Inuyasha and Kagome—travels to the modern era in pursuit of a demon. A joyful family reunion ensues when Towa discovers her long-lost sister. Determined to restore Setsuna’s lost memories and peaceful slumber, the three teenage girls form a rebellious trio and journey back through time into the feudal era.Their quest soon entangles them in a high-stakes conspiracy orchestrated by the powerful beast king Kirinmaru and his ambitious daughter, Zero. Motivated by a chilling prophecy foretelling their doom at the hands of either Inuyasha’s or Sesshomaru’s offspring, Zero relentlessly hunts the princesses, manipulating the mystical Rainbow Pearls embedded in their eyes. Along the way, the girls clash with Sesshomaru’s enigmatic loyal servant, Jaken, and face earth-shattering revelations about their lineage. They discover that Sesshomaru and Rin—who is trapped in the Tree of Ages—are actually their
biological parents, and they were hidden away to protect them from Kirinmaru's wrath.As the narrative accelerates, the princesses confront escalating perils, including the corrupted human Kirinmaru’s advisor, Osamu Kirin. To defeat these god-like adversaries, the cousins must unlock their latent half-demon powers. Towa struggles to embrace her demonic blood without losing her humanity, Setsuna masters her devastating naginata techniques, and Moroha taps into her formidable spiritual powers by unleashing her feral "Red-Cure" persona.The climax culminates in a desperate, multi-generational battle at the summit of Mount Fuji to prevent the apocalyptic Grim Comet from destroying the world. Sacrifices are made, bonds are tested, and ultimate destinies are forged. Setsuna tragically falls in battle against Zero, only for Towa’s profound grief to awaken her true demonic potential, allowing her to forge the
legendary sword Tenseiga and resurrect her twin. Ultimately, the princesses triumph over their ancestral enemies, reforge broken family bonds, and carve out their own legendary paths across time.