Diabolo(ディアボロ) is a manga by Kaoru Ohashi and Kei Kusunoki. The story takes place in Japan. The plot revolves around teenagers being converted to followers of the "Diabolo" by a secret society in exchange for the fulfillment of their wishes. Teens who have made a pact with the Devil begin to go crazy at age 17, often manifesting in acts of brutality and homicide, and upon turning 18 reach a point of no return to their original selves. The phenomena is a mystery to the adult world and media, who try to ascertain the origin of mass teen violence. There are six great spirits (also teenagers) that serve the Devil, each of which has a hand in destroying the world. The main characters, Ren and Rai, use their own Devil-given powers to stop them while searching for their cousin Mio, saving other t