During a fiercely hot summer in Sotoba, a peaceful and quiet village with a population of 1300 people, a series of bizarre deaths begin to occur. At the same time, a strange family moves into a long abandoned mansion in the region. Hospital dean Toshio Ozaki cannot figure out the cause of death in the deceased, initially suspecting an epidemic. As investigations continue between the hospital staff and the residents, it turns out that the village is being attacked by vampires.

Plot Summary:Kenzou Tenma, a Japanese brain surgeon in Germany, had it all: incredible skill at his work, a rich and beautiful fiancee, and a promising career at his hospital. However, after becoming disenchanted by hospital politics, he chose to save the life of a young boy who got shot in the head over the life of the mayor. As a result he lost the support of the hospital director, as well as his position in the hospital and his fiance. A short time later, the hospital director and the doctors that replaced him were murdered, and once again he was catapulted back onto the top. But as the chief suspect of the murders, Tenma did not get a easy life. As a matter of fact, it seems that the boy he saved was much more than he had appeared to be… Now to clear his name and to correct his past mistake, Tenma must get to the bottom of these and other murders, and investigate the truth of the Monster who is behind all of this

allies, and her chevalier, Haji, to rid the world of chiropteran and rediscover her identity. The course of the journey reveals the background history of the chiropterans and Saya’s very deep past, which extends into the mid-19th century.

Hiyorimi Hiro has just moved to the city to meet his sister. Since their parents died, he and his sister Sawawa have lived apart. Now, Sawawa has gotten a new job as the caretaker of a creepy old mansion, and has sent Hiro a letter asking him to come and stay there with her. While walking down the street, he saves a young woman clad in Gothic clothes from being crushed by construction beams, but ends up losing his own life in the process. The girl then resurrects him, leaving him alive in the hospital morgue. He wakes up confused over what happened, only to encounter the woman again as she eliminates some wolf creatures. She addresses Hiro as her servant and introduces herself as Hime (Japanese for "Princess") and explains that she is a member of the royal family of the Monster Realm.All members of the royal family are endowed with the power to turn a dead body into an immortal warrior, who will serve and protect them, and become semi-immortal. Hiro is now Hime's immortal warrior, but she herself is not immortal yet, which is why she needs help from warriors. The story then follows Hiro as he assists Hime in killing creatures that have been sent by her siblings to attack her in the competition for theMonster Kingdom's throne.