The Obake Zukan series illustrates various monsters and spirits and explains why they are scary. (Source: ANN)

When a handsome vampire finds a kitten on the verge of death, he cannot help but take pity on the poor creature and save its life the only way he knows how: by offering it some of his blood and granting it eternal life as a vampire cat. The kitten—now known as Nyanpire—does his best to acquire blood and other red substances for his consumption. At the same time, he must also manage the difficulties of being a household pet and keeping up with the other strange cats around the neighborhood.

Long before Rikuo Nura was born, the legendary youkai Nurarihyon, leader of a Night Parade of One Hundred Demons, fell in love with a human woman. Though the two would initially find happiness, a threat from the terrifying fox-demon Hagoromo Gitsune would get in the way of their relationship. In the present, Rikuo has taken his rightful place as the heir to the Nura Clan. While he has accepted his youkai side, he must continue to maintain the secret of youkai, a difficult task when faced with the Keikain onmyouji clan and his youkai-obsessed friend, Kiyotsugu. Even so, Rikuo will do what he must to protect those important to him. The reappearance of the sinister Hagoromo Gitsune marks the start of Rikuo's most fearsome trial yet. The frightening creature bears a personal vendetta against his family and will stop at nothing to see her dream come to fruition. The world stands at a precipice, an all-out war that will drag Rikuo centerstage.

Junpei Kousaka is a second-year high school student who has an allergy for cats—a predicament that has made him hate cats and everything related to them. Unfortunately for him, though, he is surrounded by cat lovers: his family, his estranged childhood friend, and even his crush Kaede Mizuno. One day, while returning home from school, Junpei nonchalantly attempts to kick an empty can into the trash, but miserably misses. Instead of making it to the garbage, the can ends up breaking off the head of a cat deity statue. That fateful day, he is cursed with the ability to understand cat speech. However, he must keep his curse a secret from everyone else, because anyone who finds out will become more accident-prone and share the same fate as him. With the guidance of his cat Nyamsus and with no other choice left, Junpei now has to do a hundred good deeds for cats to lift the curse. If he is unable to complete this task, he will turn into a cat, and considering his allergy, that would be a death sentence for him!