Agnoia (Light Novel)

is a Japanese light novel series written by Takehito Koyasu and Masatoshi Takimoto, with illustrations by Karyu Yutaka and Kenichi Matsukawa. The series began publication on May 10, 2000 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
A small cape "Tsurumaizaki" in a corner of the Izu Peninsula. It was reborn as a complex school city (think tank community) by the private general hospital "Koryo" in Tokyo. Junichiro Fujimiya, the director of the hospital, was one of Japan's leading authorities in neurosurgery, and was also a researcher of "celestial sphere music" who likes to convert star pulses into music and replace it with audible areas. And his son, Sasama Fujimiya and Yuma Fujimiya, belonged to the elite group "Tenkyu Music Club" of "Koryo Gakuen High School" on the premises. At one point, an incident occurred in which several students at Koryo Gakuen disappeared in a mysterious manner. However, that was just the beginning of the battle between humans and a foreign creature called "AD" that has existed in the darkness of the world since "old" ... The first novel of the same name in the Super Multi Project, which is also being developed on a drama CD.