Nerim's Note

is a Japanese light novel series written by Masashi Hasegawa, with illustrations by Nino. The series began publication on February 10, 2005 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
It's been a month since the black season, which lasts only at night, has arrived in the city of Parakta, which is closed to steep mountains. Nellim, who attends high school, was skeptical about the phenomenon of the black period and the disappearance of his brother due to the "spirited away incident in the forest" six years ago. When Nellim meets a new medical worker, Dine, in the school infirmary, she hints at the "real thing" she is wondering about. She knows something-Nellim is convinced. Gradually attracted to Dine, Nellim and her began searching for material about the incident six years ago. To know the "truth"-. A new fantasy that cleverly involves the mystery of the Navajo period, the disappearance of his brother, his relationship with Dine, and various incidents.