Also known as: 魔王・JUVENILE・REMIX, まおう・ジュブナイル・リミックス
Manga serialized in Shounen Sunday based on the novel of Isaka Koutarou (伊坂 幸太郎). Its author and illustrator is Oosuga Megumi (大須賀 めぐみ). Isaka Koutarou has a novel named "Grasshopper" (グラスホッパー) after the antagonistic organization depicted in the manga.