When Oni-hime's father plans to retrieve Oni-hime, he calls upon four powerful warriors who swore loyalty to evil in the past life. These warriors can summon magic and change their bodily forms, and have fought many fierce and grueling battles. How can Masayoshi kill someone who's already dead? He must act fast if he is to discover the truth behind Oni-hime's deal with the devil before the restless spirits enact their vengeance. The finale to Sengoku Nights erupts in a chilling, bloody climax!

Masayoshi Kurozuka
An ordinary high school boy who discovers that he is the reincarnation of Oni-hime.

Oni-hime
A legendary princess, once called Yoshi-hime, who sold her soul to the devil to become the leader during Japan's warring period.

Nozuchi no Mikoto
Oni-hime's devil guardian.

Mizuki
A human shaman who helps Masayoshi and Nozuchi no Mikoto fight the cursing ghosts that come day by day.

Yoshino Somei
A new transfer student at Masayoshi's school who is interested in the supernatural and occult.

Sisters Kaoru Ohashi and Kei Kusunoki (born Mayumi Ohashi) are the creators of Diabolo, and have separately and together created dozens of manga series in Japan.