Twilight of the Dark Master (支配者の黄昏, Shihaisha no Tasogare) is a Japanese manga by Saki Okuse, and an OVA adaptation.

The OVA was produced by Masao Maruyama, directed by Akiyuki Shinbo, and the screenplay was written by Duane Dell'Amico and Tatsuhiko Urahata.

Long ago, the Great Mother Spirit created demons, guardians, and humans.

The guardian, Tsunami Shijo (an ancient fire manipulator from days long ago) is out to aid a fledgling human race.

Tsunami becomes involved with a woman who just lost her fiancé and her arm, and now wants to figure out why this has happened.