Takashi Natsume has always been aware of the supernatural world, but after he inherits a magical book from his grandmother, the supernatural world is aware of him!When Natsume and his friend Tanuma help a young woman find her way through the woods, they end up having to take cover from a storm in a mysterious mansion! The shelter comes at a cost though, and the boys are cajoled into joining a séance to summon a yokai. But when a sudden power outage disrupts the ritual, Natsume, Tanuma, and Nyanko Sensei are faced with something far more strange than the errant yokai they were expecting!When Natsume and his friend Tanuma help a young woman find her way through the woods, they end up having to take cover from a storm in a mysterious mansion! The shelter comes at a cost though, and the boys are cajoled into joining a séance to summon a yokai. But when a sudden power outage disrupts the ritual, Natsume, Tanuma, and Nyanko Sense