A man gets pulled into immortality against his will, bound to a woman he doesn't know, chasing a cure that might not exist. The romance that blooms between them isn't a subplot, it's the entire point, and it carries real weight because both of them are already broken before they meet. By the time you understand what she actually is, you've already fallen for her, and the show knows the cost of that.
Yakumo's ordinary life shatters when he stumbles into the path of Pai, the last surviving member of an ancient three-eyed immortal race. A fatal wound forces her to absorb his soul into her body to save him, binding them together and transforming him into an immortal against his will. Now chained to her by circumstances neither controls, Yakumo finds himself pulled into a brutal world where monsters hunt them relentlessly and ancient powers demand payment for their existence. The catch: Pai isn't one person. Sweet and childlike one moment, she becomes a cold, merciless warrior the next, her third eye unlocking devastating magic that levels entire landscapes. As they travel searching for a way to return Yakumo to mortality, attraction blooms between them despite the danger. The romance tangles with survival instinct as they uncover deeper truths about immortality, sacrifice, and whether Yakumo actually wants to return to being human at all. Violent, darkly comedic, and genuinely unsettling, this pushes past typical adventure beats into genuinely uncomfortable territory.