Toranosuke has sworn to avenge the death of his older brother, who was eaten by the demon Shunjin. A souleater, Shunjin can only be defeated by one divine sword. But when the time comes for Toranosuke to extract his revenge, can he really do it? Shunjin might be a monster, but there is something about him that draws Toranosuke's gaze. Could the demon slayer be falling for the demon? Can the quest for love triumph over the quest for revenge?