Satsuki Kakeru lost his sister by suicide and has been living a dull life ever since then. One day, he is transported into a bizarre world "Red Night" along with his friend Minase Yuka. In order to survive and escape from Red Night, he fights against Dark Spirits (Ralva) and Black Nights.

Daisuke Onoas Kakeru Satsuki
Ayano Niinaas Weltall Lisette
Chiaki Takahashias Saiko Akamine
Mai Gotouas Yuka Minase
Emiko Hagiwaraas Shiori Momono
Noriko Rikimaruas Kukuri Tachibana
Yuu Asakawaas Misuzu Kusakabe
Yokote Kumikoas Superbia / Misao Kusakabe
Kaori Mizuhashias Kaori Natsuki
Oma Ichimuraas Yukiko Hirohara