Nurarihyon no mago

Rikuo is in line to be the Third Heir of the Nura Clan, but has yet to assume the role. Everyone around him wants him to be the Third Heir, but Rikuo just wants to live a normal life as a human. One day, Rikuo's classmates invite him on a search for yokai. Kiyotsugu suggests a late-night outing to the old school building where yokai supposedly appear. Rikuo doesn't want his friends to encounter any yokai, so he tells the yokai at his mansion to stay home. But when he joins his friends at the old school building, things don't go quite as planned.

Zen, the master of potions who has always been like a brother to Rikuo, pays a visit to the Nura Clan, accompanied by his servant Hebidayu. Nurarihyon had invited Zen, seeking his help to convince Rikuo to become the Third Heir. But a chat with Zen doesn't help change Rikuo's mind at all, and Zen loses his temper with him. His rage, however, causes him to collapse because his poisonous wings have gradually made him weaker.

Yura Keikain, a new student in Rikuo's class, seems to hit it off with Kiyotsugu when they start talking about yokai. Kiyotsugu gets a little carried away and decides to start the Kiyojuji Paranormal Patrol to search for yokai. Of all places, Kiyotsugu suggests Rikuo's mansion to hold a ceremony to celebrate the founding of the Paranormal Patrol. Rikuo has no choice but to invite his classmates over to his house, so he tells the yokai to hide when his friends arrive. But when Yura steps inside his house, she senses yokai energy. Could Yura be hiding something herself?

It's been some time since Nurarihyon excommunicated the Kyuso Clan. Kyuso, the head of the clan, forced out the Bakeneko Clan from First Street and was running wild in that area of Ukiyoe Town. Then Kyuso kidnaps Rikuo's classmates Kana and Yura and demands that Rikuo abdicate his succession to the Third Heir to ensure the girls' safe return. Rikuo never planned on becoming the Third Heir anyways, but just when he is about to agree to Kyuso's demands, Ryota-Neko, the head of the Bakeneko Clan steps in to take matters into his own hands.

Rikuo develops a fever, and his classmates Kiyotsugu, Kana, and Yura pay him a surprise visit. Tsurara, who was taking care of Rikuo, panics when she sees Kana. Kana is visibly concerned that Tsurara would visit Rikuo on her own. But just then, Kiyotsugu interrupts with an announcement regarding the Kiyojuji Paranormal Patrol. He has planned the group’s first yokai field trip to Mt. Nejireme.

Rikuo and his friends arrive at Mt. Nejireme, which happens to be the domain of a Nura Clan affiliate, the Gyuki Clan. The mountain is oozing with yokai energy, and Yura the onmyoji is not the only one who perceives the eeriness lingering in the air. Rikuo notices how frightened Maki and Tori are, and he suggests they forget about this trip and go home. But Kiyotsugu says this is how a yokai trip should be, and he ignores Rikuo’s suggestion. When the group arrives at the hotel, Professor Adashibara, the yokai expert, warns them not to go outside after twilight.