About Defense Devil

Kucabara was recently banished and stripped of his powers. In order to regain his powers, he needs dark matter which is found from human sinners. He decides to become a Defense Devil in order to get dark matter. A Defense Devil's duty is to prove the innocence of human sinner of his or her crime; once that is done, a Defense Devil is be allowed to take the sinner's dark matter. Kucabara then must prove the sinner's innocence before a Shinigami takes the sinner to hell. One day, Kucabara's friend Funi arrives and tells him the demon world is in upheaval and Kucabara must return to save it.