Gabriel Dropout is a manga series written and illustrated by Ukami. The series began its serialization in the magazine Dengeki Daioh G of ASCII Media Works from December of 2013. An adaptation to anime by Doga Kobo began airing in Japan from January 9, 2017.
The opening is Gabriel Dropkick while the ending is Hallelujah Essaim. Both being played by Miyu Tomita (Gabriel), Saori Ounishi (Vignette) Naomi Ouzora (Satanichia), and Kana Hanazawa (Raphiel).