While the day belongs to humans, the night belongs to yokai,supernatural creatures that thrive on human fear. Caught between theseworlds is Rikuo Nura. He's three-quarters human, but his grandfather isnone other than Nurarihyon, the supreme commander of the Nura clan, apowerful yokai consortium. So, Rikuo is an ordinary teenager threequarters of the time, until his yokai blood awakens. Then Rikuotransforms into the future leader of the Nura clan, leading a hundreddemons.
The battle against Nue heats up as Rikuo and members of the opposing clans move to Mt. Osore, a holy mountain where spirits of the dead are called into battle. Will a reforged Nenekirimaru, the renowned yokai-killing blade, work to defeat the legions of the undead?