The background is in the distant future after the destruction brought about by Armageddon. The war between the vampires and the humans continue to persist. In order to protect the humans from the vampires, Vatican has to rely on other allies to counter the situation. The protagonist, a priest called Peter Abel Nightroad, travels through the countries as a representative for the Vaticans. However, he is also part of “Ax”, a special operations group controlled by the Cardinal Catherina. His encounter with a young girl called Esther will determine the struggle and survival between the human race and the vampires.
After an unknown virus wiped out all adults on earth, vampires appeared and ruled over the surviving children, treating them like livestock. Yuichiro Hyakuya survived along with other orphans by giving their blood to vampires, until Yuichiro escaped four years ago. Now he is a member of the Moon Demon Company, a unit in the Japanese army dedicated to hunting down the vampires he blames for the death of his family.
Sotobamura is a small village with around 1300 residents; so small the village isn’t even connected to a single highway. An isolated village in which old customs, such as the burial of the dead, are still practiced. One day, the bodies of three people are found dead. Although Ozaki Toshio, the village’s lone doctor, feels uncertain, he treats the deaths as a normal occurrence. However, in the days following, the villagers start to die one after the other.
Throughout the passage of time and the shifts in backgrounds, a particular war continues to leave its mark on history, extending its influence into the modern world. There are two major groups involved in the ensuring war. The first group consists of monsters known as Chiropterans who can change their appearances into that of human beings.
They are actually immortals who feed on the blood of the living. The second group is an organisation known as the “Red Shield”, formed to track down these monsters and exterminate them. Otonashi Saya is a high-school girl who lives a peaceful life with her family. The only problem is, she has no recollections of her life beyond that of the past year. However, her happy life will be destroyed by an event that will lead her to her destined fate.
Due to poor grades, Tsukune Aono, an average high school student, has been unable to get accepted into any private academy of his choice. By exceptional accident, the only school to accept him turns out to be anything but ordinary; the school is attended by youkai disguised as humans. Fearing for his life, he attempts to escape only to meet Moka Akashiya, a beautiful girl who just happens to be a vampire. Despite this, Tsukune decides to stay at the academy, hiding his human nature from students and teachers. Tsukune also discovers that when the rosary around Moka’s neck is removed, her true nature emerges.
References: Ranker, ANN, Wiki