Boogiepop

is a Japanese light novel series written by Kouhei Kadono, with illustrations by Kouji Ogata. The series began publication on February 10, 1998 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The series has been licensed in english by Seven Seas Entertainment. However, the series has been discontinued by the publisher.

Synopsis
Hushed exchanges among the female student populace of Shinyo Academy center around an enigmatic supernatural entity. This entity is Boogiepop, a Shinigami who is rumored to murder people at the height of their beauty before their allure wanes. Few know of his true nature: a guardian who, between periods of dormancy, manifests as the alter ego of a high school girl named Touka Miyashita to fend off "the enemies of the world." Now, a string of mysterious disappearances—presumed by the school to be merely runaways—has caused Boogiepop to awaken. But somewhere in the academy, a menacing creature hides, waiting for its opportune moment to strike.

Boogiepop wa Warawanai subtly explores the intrinsic associations between human beings and their perception of time, while delving into its characters' complex relationships, emotions, memories, and pasts.

Boogiepop and Others
An anime adaption of the light novel. It aired for 12 episodes between January 5, 2000 and March 22, 2000

Boogiepop and Others (2019)
An anime adaptation of the light novel, remaking the original anime series. It aired for 18 episodes between January 4, 2019 and March 29, 2019