When a little girl named Mio wants to save her brother from violent beatings, she turns to Ren and Rai to put an end to the brutality. However, it all might just be a prelude to greater violence. Seventeen-year-olds all around the world have been receiving the same message: 'My name is Angel. I'll save you.' What is behind the strange and unexplained phenomenon? Is this a challenge from the Diabolo?

Ren Makimura
Ren fell prey to the Diabolo's trap when he was desperate to save his cousin Mio at age seven. He couldn't save her - and is now reviled as a murderer - but did receive a powerful gift from the Diabolo in exchange for his cousin's life.

Rai
Rai is an unlucky young man who grew up in an orphanage, never knowing his parents. His is a kind soul who wanted to become strong in order to defend Mio ... whom, alas, he lost to the Diabolo.

Chiaki
A seventeen-year-old girl with more than her fair share of emotional, uhh, challenges.

Mako
Mako is Chiaki's emotional Rock of Gibraltar. He introduced her to her current boyfriend.

Hiromi
Hiromi wants to be beautiful, but everyone thinks she's depressing and ugly. She wishes for beauty ... to be beautiful like Arisa ... and Diabolo answers.

Arisa
Arisa is one of the prettiest girls at school. She has a dark secret: she's made a pact with Diabolo.

Nema
A mysterious and beautiful young girl who repeatedly appears before Ren and Rai ... what is her connection to the Diabolo?

Kei Kusunoki & Kaoru Ohashi - the creators of the Diablo manga series.