Dizier, a demon with an immortal lifespan, falls deeply in love with Hanae, a mortal woman. For decades, he risks everything, crossing between realms to be with her, devoted to her happiness. However, he is unprepared for the inevitable—Hanae’s mortal life comes to an end, leaving him grief-stricken and alone. Centuries later, Dizier encounters a human man who bears an uncanny resemblance to his lost love, igniting a dangerous obsession. Convinced this man is Hanae reincarnated, Dizier spirals between hope and heartbreak, struggling to reconcile his love for the past with the reality of the present.