Boogiepop wa Warawanai

Boogiepop, a rumored shinigami, is said to lurk where they cannot be seen. Five years ago, a string of gruesome murders shocked the populace, and students attributed some of those killings to the aforementioned death god. When mysterious happenings once again affect the lives of those attending Hijiridani High School and Shinyo Academy, whispers of the enigmatic Boogiepop are resurrected. The stories being told may contain partial truths, or perhaps the world as humans know it is more dangerous than previously believed.

Plot summary from MyAnimeList. Data and images via Jikan API.