College student Takakage Takasaka and his half-sister Maiko begin experiencing vivid dreams that mirror their supposed past lives during the Sengoku Era. While navigating the complexities of campus life and a deceptive romantic ploy by his childhood friend Mayumi, Takakage encounters a mysterious woman named Ayame at a local shrine. This meeting triggers a deep, inexplicable connection, suggesting that a tragic romance from centuries ago is destined to resurface in their modern lives.