Boogiepop Changeling: Youan no Decadent Black

is the nineteenth volume of the Boogiepop light novel series, written by Kouhei Kadono and Illustrated by Kouji Ogata. It was released under the Dengeki Bunko Imprint in November 2014.

Synopsis
Do you want to fall? Do you want to throw away the troublesome things of your own will and indulge in easy satisfaction by being swept away by the sloppy world? While feeling stupid to wait first, do you want to blend in with your dark passion? The damp impulse is the Decadant Black. Whether it's dangerous or not, I couldn't even grasp it in my boogiepop series-the two stalkers exchanged their surveillance targets and chose to hide more in the shadows, which is a strange fate. The mysterious desire to replace the god of death, who decides the fate of the world, pollutes the hearts of the girls involved. The new engraving of the chairman of the discipline, who is trying to solve the situation, is inevitably dragged into the black decadence. At the end of the day, does she choose a relentless condemnation or a collapse of her co-fall?

(source: Bookwalker JP - Translated)

Characters

 * Boogiepop / Miyashita Touka
 * Nagi Kirima
 * Kazuko Suema
 * Kei Niitoki
 * The King of Distortion