It is the official novel adaptation of the anime series. It expands on the events of the anime and gives greater background information on the battle against chiropterans.

On the morning following the eve of their engagement, the fiancée disappears from the man's side. He is left to reminisce about why she chose to run away. (Source: IMDB)

In the year 2290 in Tokyo, a powerful detective association financed by the state is in charge of resolving criminal cases, relegating the police to the background. Although now a new generation of detectives with supernatural powers has appeared that threatens their supremacy. In this climate, the "detective ritual" is convened, a shady initiation ceremony for the Order of Gentlemen Detectives that is carried out on a mysterious island that only appears on special days.

42 mangaka write short stories about the food they eat.

The story follows Mototsu Yagami, a college student who can see ghosts but doesn't want to. In college, he meets Koyomi Nada, who was his junior in high school. Out of unrequited love for her, he follows her into the "occult research society," which is full of eccentrics who fill their campus life with the occult. (Source: Anime News Network)

A journalist is one who collects stories suitable for television and news, but the young journalist in Researcher must learn all the difficulties that come with the job including big wigs of the company who look down on her and the rival companies who threaten her business.