Something extra-wicked this way comes! Ren and Rai play with fire when they sell their souls to the demon Diabolo to save Ren's cousin. Diabolo gives Ren the power of ultimate defense and Rai the power of ultimate offense. However, those who fall into the Diabolo's trap start to go crazy at 17, and at age 18 they reach the point of no return....

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.